From 6cb99dafc0bc44e2eabdd04e0452f716362b0513 Mon Sep 17 00:00:00 2001 From: Peter Robinson Date: Tue, 25 Jun 2019 19:41:59 +0100 Subject: bcm2835: upstream fix for Raspberry Pi load issue --- bcm2835-vchiq-use-interruptible-waits.patch | 1133 +++++++++++++++++++++++++++ 1 file changed, 1133 insertions(+) create mode 100644 bcm2835-vchiq-use-interruptible-waits.patch (limited to 'bcm2835-vchiq-use-interruptible-waits.patch') diff --git a/bcm2835-vchiq-use-interruptible-waits.patch b/bcm2835-vchiq-use-interruptible-waits.patch new file mode 100644 index 000000000..7f9e4f937 --- /dev/null +++ b/bcm2835-vchiq-use-interruptible-waits.patch @@ -0,0 +1,1133 @@ +From patchwork Thu May 9 14:31:33 2019 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +X-Patchwork-Submitter: Nicolas Saenz Julienne +X-Patchwork-Id: 10937231 +Return-Path: + +Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org + [172.30.200.125]) + by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 40C4F1390 + for ; + Thu, 9 May 2019 14:32:04 +0000 (UTC) +Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) + by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2BBD428A62 + for ; + Thu, 9 May 2019 14:32:04 +0000 (UTC) +Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) + id 259A428AE0; Thu, 9 May 2019 14:32:04 +0000 (UTC) +X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on + pdx-wl-mail.web.codeaurora.org +X-Spam-Level: +X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 +Received: from bombadil.infradead.org (bombadil.infradead.org + [198.137.202.133]) + (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) + (No client certificate requested) + by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 415AA28B73 + for ; + Thu, 9 May 2019 14:32:02 +0000 (UTC) +DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; + d=lists.infradead.org; s=bombadil.20170209; h=Sender: + Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: + List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: + Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: + Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: + List-Owner; bh=3uJvYwW6NsoePeXJ/5ZwETYJ0KPDLBZYP0UKnW2FJN4=; b=C5epWZQXitegMi + If9WNmt+WIU1qZ5/Zf/K4VyHyLndbbGCz0fCiywJ6C2lL05k2rkyKPLD/5JD9WearPWtXUZKjfWel + 4TaT/dbnBmWnFmxZh/HH6Esg+Nm+f0XTmfQX4CTfAa37AkyGpHcpGoR+JHCXe8tJXjKtdGG3S+9Jl + l7TTzLJHyGUpJ6SOuB1s2T6hTBGi1fiJzUWjFZzONtMSbnu0gOhemwnL5paYqUdrs7KQq6BqZPU8Z + 48BFzV3uTQ/ux271qzmUx1beTRSqKwtlzquZtS9PutYKyvIm9oyEglAsOkBBVUY+9b8B0HWoWkUvv + w7rWaT6L1ZSjMthb9UtA==; +Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) + by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) + id 1hOk5T-0005hY-5q; Thu, 09 May 2019 14:31:55 +0000 +Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) + by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) + id 1hOk5P-0005fv-Tq; Thu, 09 May 2019 14:31:53 +0000 +X-Virus-Scanned: by amavisd-new at test-mx.suse.de +Received: from relay2.suse.de (unknown [195.135.220.254]) + by mx1.suse.de (Postfix) with ESMTP id 9E8A6AC7E; + Thu, 9 May 2019 14:31:50 +0000 (UTC) +From: Nicolas Saenz Julienne +To: linux-kernel@vger.kernel.org +Subject: [PATCH v3 1/4] staging: vchiq_2835_arm: revert "quit using custom + down_interruptible()" +Date: Thu, 9 May 2019 16:31:33 +0200 +Message-Id: <20190509143137.31254-2-nsaenzjulienne@suse.de> +X-Mailer: git-send-email 2.21.0 +In-Reply-To: <20190509143137.31254-1-nsaenzjulienne@suse.de> +References: <20190509143137.31254-1-nsaenzjulienne@suse.de> +MIME-Version: 1.0 +X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 +X-CRM114-CacheID: sfid-20190509_073152_105160_D40F2444 +X-CRM114-Status: GOOD ( 13.03 ) +X-BeenThere: linux-arm-kernel@lists.infradead.org +X-Mailman-Version: 2.1.21 +Precedence: list +List-Id: +List-Unsubscribe: + , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: + , + +Cc: stefan.wahren@i2se.com, devel@driverdev.osuosl.org, + Greg Kroah-Hartman , + Eric Anholt , + linux-rpi-kernel@lists.infradead.org, dan.carpenter@oracle.com, + Nicolas Saenz Julienne , + linux-arm-kernel@lists.infradead.org +Content-Type: text/plain; charset="us-ascii" +Sender: "linux-arm-kernel" +Errors-To: + linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org +X-Virus-Scanned: ClamAV using ClamSMTP + +The killable version of down() is meant to be used on situations where +it should not fail at all costs, but still have the convenience of being +able to kill it if really necessary. VCHIQ doesn't fit this criteria, as +it's mainly used as an interface to V4L2 and ALSA devices. + +Fixes: ff5979ad8636 ("staging: vchiq_2835_arm: quit using custom down_interruptible()") +Signed-off-by: Nicolas Saenz Julienne +Acked-by: Stefan Wahren +--- + .../staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +index a9a22917ecdb..49d3b39b1059 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +@@ -514,7 +514,7 @@ create_pagelist(char __user *buf, size_t count, unsigned short type) + (g_cache_line_size - 1)))) { + char *fragments; + +- if (down_killable(&g_free_fragments_sema)) { ++ if (down_interruptible(&g_free_fragments_sema) != 0) { + cleanup_pagelistinfo(pagelistinfo); + return NULL; + } + +From patchwork Thu May 9 14:31:34 2019 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +X-Patchwork-Submitter: Nicolas Saenz Julienne +X-Patchwork-Id: 10937237 +Return-Path: + +Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org + [172.30.200.125]) + by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 94E28933 + for ; + Thu, 9 May 2019 14:32:36 +0000 (UTC) +Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) + by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 80F8B28B78 + for ; + Thu, 9 May 2019 14:32:36 +0000 (UTC) +Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) + id 7D0F128B1B; Thu, 9 May 2019 14:32:36 +0000 (UTC) +X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on + pdx-wl-mail.web.codeaurora.org +X-Spam-Level: +X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 +Received: from bombadil.infradead.org (bombadil.infradead.org + [198.137.202.133]) + (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) + (No client certificate requested) + by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9B03628BB9 + for ; + Thu, 9 May 2019 14:32:35 +0000 (UTC) +DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; + d=lists.infradead.org; s=bombadil.20170209; h=Sender: + Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: + List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: + Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: + Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: + List-Owner; bh=WHM2WEnAejOnk0J6GjEHKXrK0nKxgdLNq48dTkgDLgo=; b=i5Mm8gffWR7Rwq + 4+uMDe6lJY5SKE65Kz4KtVkygMKsGS6oguaK3wvgh6OGo77kqnFU+0r6HHBQr3xb/0KJq4yq6IV9y + auU1WltykbzEJmRd+Tj3oJX6kaz+Tqagk88AQMUCSuyB95Elbvxqr7Q0ro4NGwveXvkM0CY8EkAcR + IvfNzMbS6tp0ZVcMflUHecbTThrfVr2H65WipivLLqS7FQtyly6cx1EkEyt3TV+53CAT2uY5l5wDb + BD2hOBPWrdwsgGFk4plnPlYV71/jQEL6zqb7ScYMQ8PXEC+SIifPvonzmTaGsXAss7CyNQefMsp6U + RSJQYwd9gv1L/MOawrgg==; +Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) + by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) + id 1hOk61-0006Sg-ER; Thu, 09 May 2019 14:32:29 +0000 +Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) + by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) + id 1hOk5Q-0005fw-IZ; Thu, 09 May 2019 14:31:54 +0000 +X-Virus-Scanned: by amavisd-new at test-mx.suse.de +Received: from relay2.suse.de (unknown [195.135.220.254]) + by mx1.suse.de (Postfix) with ESMTP id 4DE02ACB1; + Thu, 9 May 2019 14:31:51 +0000 (UTC) +From: Nicolas Saenz Julienne +To: linux-kernel@vger.kernel.org +Subject: [PATCH v3 2/4] staging: vchiq: revert "switch to + wait_for_completion_killable" +Date: Thu, 9 May 2019 16:31:34 +0200 +Message-Id: <20190509143137.31254-3-nsaenzjulienne@suse.de> +X-Mailer: git-send-email 2.21.0 +In-Reply-To: <20190509143137.31254-1-nsaenzjulienne@suse.de> +References: <20190509143137.31254-1-nsaenzjulienne@suse.de> +MIME-Version: 1.0 +X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 +X-CRM114-CacheID: sfid-20190509_073152_902395_DF67A86F +X-CRM114-Status: GOOD ( 15.86 ) +X-BeenThere: linux-arm-kernel@lists.infradead.org +X-Mailman-Version: 2.1.21 +Precedence: list +List-Id: +List-Unsubscribe: + , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: + , + +Cc: stefan.wahren@i2se.com, devel@driverdev.osuosl.org, + Greg Kroah-Hartman , + Eric Anholt , + linux-rpi-kernel@lists.infradead.org, dan.carpenter@oracle.com, + Nicolas Saenz Julienne , + linux-arm-kernel@lists.infradead.org +Content-Type: text/plain; charset="us-ascii" +Sender: "linux-arm-kernel" +Errors-To: + linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org +X-Virus-Scanned: ClamAV using ClamSMTP + +The killable version of wait_for_completion() is meant to be used on +situations where it should not fail at all costs, but still have the +convenience of being able to kill it if really necessary. VCHIQ doesn't +fit this criteria, as it's mainly used as an interface to V4L2 and ALSA +devices. + +Fixes: a772f116702e ("staging: vchiq: switch to wait_for_completion_killable") +Signed-off-by: Nicolas Saenz Julienne +--- + .../interface/vchiq_arm/vchiq_arm.c | 21 ++++++++++--------- + .../interface/vchiq_arm/vchiq_core.c | 21 ++++++++++--------- + .../interface/vchiq_arm/vchiq_util.c | 6 +++--- + 3 files changed, 25 insertions(+), 23 deletions(-) + +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +index ab7d6a0ce94c..62d8f599e765 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +@@ -532,7 +532,8 @@ add_completion(VCHIQ_INSTANCE_T instance, VCHIQ_REASON_T reason, + vchiq_log_trace(vchiq_arm_log_level, + "%s - completion queue full", __func__); + DEBUG_COUNT(COMPLETION_QUEUE_FULL_COUNT); +- if (wait_for_completion_killable(&instance->remove_event)) { ++ if (wait_for_completion_interruptible( ++ &instance->remove_event)) { + vchiq_log_info(vchiq_arm_log_level, + "service_callback interrupted"); + return VCHIQ_RETRY; +@@ -643,7 +644,7 @@ service_callback(VCHIQ_REASON_T reason, struct vchiq_header *header, + } + + DEBUG_TRACE(SERVICE_CALLBACK_LINE); +- if (wait_for_completion_killable( ++ if (wait_for_completion_interruptible( + &user_service->remove_event) + != 0) { + vchiq_log_info(vchiq_arm_log_level, +@@ -978,7 +979,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + has been closed until the client library calls the + CLOSE_DELIVERED ioctl, signalling close_event. */ + if (user_service->close_pending && +- wait_for_completion_killable( ++ wait_for_completion_interruptible( + &user_service->close_event)) + status = VCHIQ_RETRY; + break; +@@ -1154,7 +1155,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + + DEBUG_TRACE(AWAIT_COMPLETION_LINE); + mutex_unlock(&instance->completion_mutex); +- rc = wait_for_completion_killable( ++ rc = wait_for_completion_interruptible( + &instance->insert_event); + mutex_lock(&instance->completion_mutex); + if (rc != 0) { +@@ -1324,7 +1325,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + do { + spin_unlock(&msg_queue_spinlock); + DEBUG_TRACE(DEQUEUE_MESSAGE_LINE); +- if (wait_for_completion_killable( ++ if (wait_for_completion_interruptible( + &user_service->insert_event)) { + vchiq_log_info(vchiq_arm_log_level, + "DEQUEUE_MESSAGE interrupted"); +@@ -2328,7 +2329,7 @@ vchiq_keepalive_thread_func(void *v) + while (1) { + long rc = 0, uc = 0; + +- if (wait_for_completion_killable(&arm_state->ka_evt) ++ if (wait_for_completion_interruptible(&arm_state->ka_evt) + != 0) { + vchiq_log_error(vchiq_susp_log_level, + "%s interrupted", __func__); +@@ -2579,7 +2580,7 @@ block_resume(struct vchiq_arm_state *arm_state) + write_unlock_bh(&arm_state->susp_res_lock); + vchiq_log_info(vchiq_susp_log_level, "%s wait for previously " + "blocked clients", __func__); +- if (wait_for_completion_killable_timeout( ++ if (wait_for_completion_interruptible_timeout( + &arm_state->blocked_blocker, timeout_val) + <= 0) { + vchiq_log_error(vchiq_susp_log_level, "%s wait for " +@@ -2605,7 +2606,7 @@ block_resume(struct vchiq_arm_state *arm_state) + write_unlock_bh(&arm_state->susp_res_lock); + vchiq_log_info(vchiq_susp_log_level, "%s wait for resume", + __func__); +- if (wait_for_completion_killable_timeout( ++ if (wait_for_completion_interruptible_timeout( + &arm_state->vc_resume_complete, timeout_val) + <= 0) { + vchiq_log_error(vchiq_susp_log_level, "%s wait for " +@@ -2812,7 +2813,7 @@ vchiq_arm_force_suspend(struct vchiq_state *state) + do { + write_unlock_bh(&arm_state->susp_res_lock); + +- rc = wait_for_completion_killable_timeout( ++ rc = wait_for_completion_interruptible_timeout( + &arm_state->vc_suspend_complete, + msecs_to_jiffies(FORCE_SUSPEND_TIMEOUT_MS)); + +@@ -2908,7 +2909,7 @@ vchiq_arm_allow_resume(struct vchiq_state *state) + write_unlock_bh(&arm_state->susp_res_lock); + + if (resume) { +- if (wait_for_completion_killable( ++ if (wait_for_completion_interruptible( + &arm_state->vc_resume_complete) < 0) { + vchiq_log_error(vchiq_susp_log_level, + "%s interrupted", __func__); +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c +index 0c387b6473a5..c65cf1e6f910 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c +@@ -560,7 +560,7 @@ reserve_space(struct vchiq_state *state, size_t space, int is_blocking) + remote_event_signal(&state->remote->trigger); + + if (!is_blocking || +- (wait_for_completion_killable( ++ (wait_for_completion_interruptible( + &state->slot_available_event))) + return NULL; /* No space available */ + } +@@ -830,7 +830,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service, + spin_unlock("a_spinlock); + mutex_unlock(&state->slot_mutex); + +- if (wait_for_completion_killable( ++ if (wait_for_completion_interruptible( + &state->data_quota_event)) + return VCHIQ_RETRY; + +@@ -861,7 +861,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service, + service_quota->slot_use_count); + VCHIQ_SERVICE_STATS_INC(service, quota_stalls); + mutex_unlock(&state->slot_mutex); +- if (wait_for_completion_killable( ++ if (wait_for_completion_interruptible( + &service_quota->quota_event)) + return VCHIQ_RETRY; + if (service->closing) +@@ -1710,7 +1710,8 @@ parse_rx_slots(struct vchiq_state *state) + &service->bulk_rx : &service->bulk_tx; + + DEBUG_TRACE(PARSE_LINE); +- if (mutex_lock_killable(&service->bulk_mutex)) { ++ if (mutex_lock_killable( ++ &service->bulk_mutex) != 0) { + DEBUG_TRACE(PARSE_LINE); + goto bail_not_ready; + } +@@ -2428,7 +2429,7 @@ vchiq_open_service_internal(struct vchiq_service *service, int client_id) + QMFLAGS_IS_BLOCKING); + if (status == VCHIQ_SUCCESS) { + /* Wait for the ACK/NAK */ +- if (wait_for_completion_killable(&service->remove_event)) { ++ if (wait_for_completion_interruptible(&service->remove_event)) { + status = VCHIQ_RETRY; + vchiq_release_service_internal(service); + } else if ((service->srvstate != VCHIQ_SRVSTATE_OPEN) && +@@ -2795,7 +2796,7 @@ vchiq_connect_internal(struct vchiq_state *state, VCHIQ_INSTANCE_T instance) + } + + if (state->conn_state == VCHIQ_CONNSTATE_CONNECTING) { +- if (wait_for_completion_killable(&state->connect)) ++ if (wait_for_completion_interruptible(&state->connect)) + return VCHIQ_RETRY; + + vchiq_set_conn_state(state, VCHIQ_CONNSTATE_CONNECTED); +@@ -2894,7 +2895,7 @@ vchiq_close_service(VCHIQ_SERVICE_HANDLE_T handle) + } + + while (1) { +- if (wait_for_completion_killable(&service->remove_event)) { ++ if (wait_for_completion_interruptible(&service->remove_event)) { + status = VCHIQ_RETRY; + break; + } +@@ -2955,7 +2956,7 @@ vchiq_remove_service(VCHIQ_SERVICE_HANDLE_T handle) + request_poll(service->state, service, VCHIQ_POLL_REMOVE); + } + while (1) { +- if (wait_for_completion_killable(&service->remove_event)) { ++ if (wait_for_completion_interruptible(&service->remove_event)) { + status = VCHIQ_RETRY; + break; + } +@@ -3038,7 +3039,7 @@ VCHIQ_STATUS_T vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, + VCHIQ_SERVICE_STATS_INC(service, bulk_stalls); + do { + mutex_unlock(&service->bulk_mutex); +- if (wait_for_completion_killable( ++ if (wait_for_completion_interruptible( + &service->bulk_remove_event)) { + status = VCHIQ_RETRY; + goto error_exit; +@@ -3115,7 +3116,7 @@ VCHIQ_STATUS_T vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, + + if (bulk_waiter) { + bulk_waiter->bulk = bulk; +- if (wait_for_completion_killable(&bulk_waiter->event)) ++ if (wait_for_completion_interruptible(&bulk_waiter->event)) + status = VCHIQ_RETRY; + else if (bulk_waiter->actual == VCHIQ_BULK_ACTUAL_ABORTED) + status = VCHIQ_ERROR; +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_util.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_util.c +index 6c519d8e48cb..8ee85c5e6f77 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_util.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_util.c +@@ -50,7 +50,7 @@ void vchiu_queue_push(struct vchiu_queue *queue, struct vchiq_header *header) + return; + + while (queue->write == queue->read + queue->size) { +- if (wait_for_completion_killable(&queue->pop)) ++ if (wait_for_completion_interruptible(&queue->pop)) + flush_signals(current); + } + +@@ -63,7 +63,7 @@ void vchiu_queue_push(struct vchiu_queue *queue, struct vchiq_header *header) + struct vchiq_header *vchiu_queue_peek(struct vchiu_queue *queue) + { + while (queue->write == queue->read) { +- if (wait_for_completion_killable(&queue->push)) ++ if (wait_for_completion_interruptible(&queue->push)) + flush_signals(current); + } + +@@ -77,7 +77,7 @@ struct vchiq_header *vchiu_queue_pop(struct vchiu_queue *queue) + struct vchiq_header *header; + + while (queue->write == queue->read) { +- if (wait_for_completion_killable(&queue->push)) ++ if (wait_for_completion_interruptible(&queue->push)) + flush_signals(current); + } + + +From patchwork Thu May 9 14:31:35 2019 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +X-Patchwork-Submitter: Nicolas Saenz Julienne +X-Patchwork-Id: 10937235 +Return-Path: + +Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org + [172.30.200.125]) + by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AC5351390 + for ; + Thu, 9 May 2019 14:32:19 +0000 (UTC) +Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) + by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 99D2728B65 + for ; + Thu, 9 May 2019 14:32:19 +0000 (UTC) +Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) + id 97D1428BB1; Thu, 9 May 2019 14:32:19 +0000 (UTC) +X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on + pdx-wl-mail.web.codeaurora.org +X-Spam-Level: +X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, + DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 +Received: from bombadil.infradead.org (bombadil.infradead.org + [198.137.202.133]) + (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) + (No client certificate requested) + by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 33B1628B65 + for ; 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Thu, 09 May 2019 14:32:17 +0000 +Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) + by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) + id 1hOk5R-0005gN-Bk; Thu, 09 May 2019 14:31:54 +0000 +X-Virus-Scanned: by amavisd-new at test-mx.suse.de +Received: from relay2.suse.de (unknown [195.135.220.254]) + by mx1.suse.de (Postfix) with ESMTP id 1944EACBA; + Thu, 9 May 2019 14:31:52 +0000 (UTC) +From: Nicolas Saenz Julienne +To: linux-kernel@vger.kernel.org +Subject: [PATCH v3 3/4] staging: vchiq: make wait events interruptible +Date: Thu, 9 May 2019 16:31:35 +0200 +Message-Id: <20190509143137.31254-4-nsaenzjulienne@suse.de> +X-Mailer: git-send-email 2.21.0 +In-Reply-To: <20190509143137.31254-1-nsaenzjulienne@suse.de> +References: <20190509143137.31254-1-nsaenzjulienne@suse.de> +MIME-Version: 1.0 +X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 +X-CRM114-CacheID: sfid-20190509_073153_546153_CF6CDC2C +X-CRM114-Status: GOOD ( 12.69 ) +X-BeenThere: linux-arm-kernel@lists.infradead.org +X-Mailman-Version: 2.1.21 +Precedence: list +List-Id: +List-Unsubscribe: + , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: + , + +Cc: stefan.wahren@i2se.com, devel@driverdev.osuosl.org, + Greg Kroah-Hartman , + Eric Anholt , + linux-rpi-kernel@lists.infradead.org, dan.carpenter@oracle.com, + Nicolas Saenz Julienne , + linux-arm-kernel@lists.infradead.org +Content-Type: text/plain; charset="us-ascii" +Sender: "linux-arm-kernel" +Errors-To: + linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org +X-Virus-Scanned: ClamAV using ClamSMTP + +The killable version of wait_event() is meant to be used on situations +where it should not fail at all costs, but still have the convenience of +being able to kill it if really necessary. Wait events in VCHIQ doesn't +fit this criteria, as it's mainly used as an interface to V4L2 and ALSA +devices. + +Fixes: 852b2876a8a8 ("staging: vchiq: rework remove_event handling") +Signed-off-by: Nicolas Saenz Julienne +--- + .../vc04_services/interface/vchiq_arm/vchiq_core.c | 10 +++++++++- + 1 file changed, 9 insertions(+), 1 deletion(-) + +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c +index c65cf1e6f910..44bfa890e0e5 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c +@@ -395,13 +395,21 @@ remote_event_create(wait_queue_head_t *wq, struct remote_event *event) + init_waitqueue_head(wq); + } + ++/* ++ * All the event waiting routines in VCHIQ used a custom semaphore ++ * implementation that filtered most signals. This achieved a behaviour similar ++ * to the "killable" family of functions. While cleaning up this code all the ++ * routines where switched to the "interruptible" family of functions, as the ++ * former was deemed unjustified and the use "killable" set all VCHIQ's ++ * threads in D state. ++ */ + static inline int + remote_event_wait(wait_queue_head_t *wq, struct remote_event *event) + { + if (!event->fired) { + event->armed = 1; + dsb(sy); +- if (wait_event_killable(*wq, event->fired)) { ++ if (wait_event_interruptible(*wq, event->fired)) { + event->armed = 0; + return 0; + } + +From patchwork Thu May 9 14:31:36 2019 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +X-Patchwork-Submitter: Nicolas Saenz Julienne +X-Patchwork-Id: 10937239 +Return-Path: + +Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org + [172.30.200.125]) + by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 662BC1390 + for ; + Thu, 9 May 2019 14:32:50 +0000 (UTC) +Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) + by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 532DC289F8 + for ; 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bh=hbC4fga5OSh0T15ei+AWcZjFFpeyd4eloz75PA9+ZSQ=; b=hjJnppgChnF+da + gJbdcmOJUMpkaSPdRWwyDVndPiJqHfiacAhGzKZsMAPsymWXz2DiL4/KVE0ULmkTm5MwapaxCUliU + gdQQ7xNOT1yyCrlMWcXYZJaeDl06ngVfgu6QoNWN02uPS55159ez5rPNpCYtA0+5npkWsREnjEF6q + 4lo12R4nB6W62VLSy5Y1/37KoyYfIaaZOJoK3i15rKYrXoKn12hjF/2DwmVuhTA+NaadTByQyDE86 + 0A91ewtqOH/KTMHTJDQrG29q03l5LAI2l6Zr5tfz23o2jLCy+3F5vZCnXTYcGxYNNJUATVmobezZj + sxUS8TZjBOuPCowBB22g==; +Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) + by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) + id 1hOk6E-0006kx-RW; Thu, 09 May 2019 14:32:42 +0000 +Received: from mx2.suse.de ([195.135.220.15] helo=mx1.suse.de) + by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) + id 1hOk5T-0005hX-0e; Thu, 09 May 2019 14:32:02 +0000 +X-Virus-Scanned: by amavisd-new at test-mx.suse.de +Received: from relay2.suse.de (unknown [195.135.220.254]) + by mx1.suse.de (Postfix) with ESMTP id AC869ACBC; + Thu, 9 May 2019 14:31:53 +0000 (UTC) +From: Nicolas Saenz Julienne +To: Eric Anholt , Stefan Wahren , + Florian Fainelli , Ray Jui , + Scott Branden , + bcm-kernel-feedback-list@broadcom.com +Subject: [PATCH v3 4/4] staging: vchiq: stop explicitly comparing with zero to + catch errors +Date: Thu, 9 May 2019 16:31:36 +0200 +Message-Id: <20190509143137.31254-5-nsaenzjulienne@suse.de> +X-Mailer: git-send-email 2.21.0 +In-Reply-To: <20190509143137.31254-1-nsaenzjulienne@suse.de> +References: <20190509143137.31254-1-nsaenzjulienne@suse.de> +MIME-Version: 1.0 +X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 +X-CRM114-CacheID: sfid-20190509_073155_533318_B386BD76 +X-CRM114-Status: GOOD ( 17.98 ) +X-BeenThere: linux-arm-kernel@lists.infradead.org +X-Mailman-Version: 2.1.21 +Precedence: list +List-Id: +List-Unsubscribe: + , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: + , + +Cc: devel@driverdev.osuosl.org, + Greg Kroah-Hartman , + linux-kernel@vger.kernel.org, + Nicolas Saenz Julienne , + dan.carpenter@oracle.com, linux-arm-kernel@lists.infradead.org, + linux-rpi-kernel@lists.infradead.org +Content-Type: text/plain; charset="us-ascii" +Sender: "linux-arm-kernel" +Errors-To: + linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org +X-Virus-Scanned: ClamAV using ClamSMTP + +The vchiq code tends to follow a coding pattern that's not accepted as +per the Linux kernel coding style + +We have this: + if (expression != 0) + +We want this: + if (expression) + +We make an exception if the expression refers to a size, in which case +it's accepted for the sake of clarity. + +Signed-off-by: Nicolas Saenz Julienne +--- + .../bcm2835-camera/bcm2835-camera.c | 11 ++-- + .../interface/vchiq_arm/vchiq_2835_arm.c | 2 +- + .../interface/vchiq_arm/vchiq_arm.c | 66 ++++++++----------- + .../interface/vchiq_arm/vchiq_connected.c | 4 +- + .../interface/vchiq_arm/vchiq_core.c | 28 ++++---- + .../interface/vchiq_arm/vchiq_debugfs.c | 4 +- + 6 files changed, 52 insertions(+), 63 deletions(-) + +diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c +index 68f08dc18da9..57f79c153277 100644 +--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c ++++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c +@@ -327,7 +327,7 @@ static void buffer_cb(struct vchiq_mmal_instance *instance, + "%s: status:%d, buf:%p, length:%lu, flags %u, pts %lld\n", + __func__, status, buf, length, mmal_flags, pts); + +- if (status != 0) { ++ if (status) { + /* error in transfer */ + if (buf) { + /* there was a buffer with the error so return it */ +@@ -359,8 +359,7 @@ static void buffer_cb(struct vchiq_mmal_instance *instance, + } + } else { + if (dev->capture.frame_count) { +- if (dev->capture.vc_start_timestamp != -1 && +- pts != 0) { ++ if (dev->capture.vc_start_timestamp != -1 && pts) { + ktime_t timestamp; + s64 runtime_us = pts - + dev->capture.vc_start_timestamp; +@@ -826,7 +825,7 @@ static int vidioc_enum_input(struct file *file, void *priv, + struct v4l2_input *inp) + { + /* only a single camera input */ +- if (inp->index != 0) ++ if (inp->index) + return -EINVAL; + + inp->type = V4L2_INPUT_TYPE_CAMERA; +@@ -842,7 +841,7 @@ static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) + + static int vidioc_s_input(struct file *file, void *priv, unsigned int i) + { +- if (i != 0) ++ if (i) + return -EINVAL; + + return 0; +@@ -1281,7 +1280,7 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, + } + + ret = mmal_setup_components(dev, f); +- if (ret != 0) { ++ if (ret) { + v4l2_err(&dev->v4l2_dev, + "%s: failed to setup mmal components: %d\n", + __func__, ret); +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +index 49d3b39b1059..cb588c0b9364 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c +@@ -514,7 +514,7 @@ create_pagelist(char __user *buf, size_t count, unsigned short type) + (g_cache_line_size - 1)))) { + char *fragments; + +- if (down_interruptible(&g_free_fragments_sema) != 0) { ++ if (down_interruptible(&g_free_fragments_sema)) { + cleanup_pagelistinfo(pagelistinfo); + return NULL; + } +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +index 62d8f599e765..9264a07cf160 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c +@@ -238,7 +238,7 @@ VCHIQ_STATUS_T vchiq_shutdown(VCHIQ_INSTANCE_T instance) + vchiq_log_trace(vchiq_core_log_level, + "%s(%p) called", __func__, instance); + +- if (mutex_lock_killable(&state->mutex) != 0) ++ if (mutex_lock_killable(&state->mutex)) + return VCHIQ_RETRY; + + /* Remove all services */ +@@ -280,7 +280,7 @@ VCHIQ_STATUS_T vchiq_connect(VCHIQ_INSTANCE_T instance) + vchiq_log_trace(vchiq_core_log_level, + "%s(%p) called", __func__, instance); + +- if (mutex_lock_killable(&state->mutex) != 0) { ++ if (mutex_lock_killable(&state->mutex)) { + vchiq_log_trace(vchiq_core_log_level, + "%s: call to mutex_lock failed", __func__); + status = VCHIQ_RETRY; +@@ -645,8 +645,7 @@ service_callback(VCHIQ_REASON_T reason, struct vchiq_header *header, + + DEBUG_TRACE(SERVICE_CALLBACK_LINE); + if (wait_for_completion_interruptible( +- &user_service->remove_event) +- != 0) { ++ &user_service->remove_event)) { + vchiq_log_info(vchiq_arm_log_level, + "%s interrupted", __func__); + DEBUG_TRACE(SERVICE_CALLBACK_LINE); +@@ -850,7 +849,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + break; + } + rc = mutex_lock_killable(&instance->state->mutex); +- if (rc != 0) { ++ if (rc) { + vchiq_log_error(vchiq_arm_log_level, + "vchiq: connect: could not lock mutex for " + "state %d: %d", +@@ -874,9 +873,8 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + void *userdata; + int srvstate; + +- if (copy_from_user +- (&args, (const void __user *)arg, +- sizeof(args)) != 0) { ++ if (copy_from_user(&args, (const void __user *)arg, ++ sizeof(args))) { + ret = -EFAULT; + break; + } +@@ -940,7 +938,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + &(((struct vchiq_create_service __user *) + arg)->handle), + (const void *)&service->handle, +- sizeof(service->handle)) != 0) { ++ sizeof(service->handle))) { + ret = -EFAULT; + vchiq_remove_service(service->handle); + } +@@ -1015,9 +1013,8 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + case VCHIQ_IOC_QUEUE_MESSAGE: { + struct vchiq_queue_message args; + +- if (copy_from_user +- (&args, (const void __user *)arg, +- sizeof(args)) != 0) { ++ if (copy_from_user(&args, (const void __user *)arg, ++ sizeof(args))) { + ret = -EFAULT; + break; + } +@@ -1049,9 +1046,8 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + (cmd == VCHIQ_IOC_QUEUE_BULK_TRANSMIT) ? + VCHIQ_BULK_TRANSMIT : VCHIQ_BULK_RECEIVE; + +- if (copy_from_user +- (&args, (const void __user *)arg, +- sizeof(args)) != 0) { ++ if (copy_from_user(&args, (const void __user *)arg, ++ sizeof(args))) { + ret = -EFAULT; + break; + } +@@ -1125,7 +1121,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + &(((struct vchiq_queue_bulk_transfer __user *) + arg)->mode), + (const void *)&mode_waiting, +- sizeof(mode_waiting)) != 0) ++ sizeof(mode_waiting))) + ret = -EFAULT; + } + } break; +@@ -1140,7 +1136,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + } + + if (copy_from_user(&args, (const void __user *)arg, +- sizeof(args)) != 0) { ++ sizeof(args))) { + ret = -EFAULT; + break; + } +@@ -1158,7 +1154,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + rc = wait_for_completion_interruptible( + &instance->insert_event); + mutex_lock(&instance->completion_mutex); +- if (rc != 0) { ++ if (rc) { + DEBUG_TRACE(AWAIT_COMPLETION_LINE); + vchiq_log_info(vchiq_arm_log_level, + "AWAIT_COMPLETION interrupted"); +@@ -1224,7 +1220,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + if (copy_from_user(&msgbuf, + (const void __user *) + &args.msgbufs[msgbufcount], +- sizeof(msgbuf)) != 0) { ++ sizeof(msgbuf))) { + if (ret == 0) + ret = -EFAULT; + break; +@@ -1232,7 +1228,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + + /* Copy the message to user space */ + if (copy_to_user(msgbuf, header, +- msglen) != 0) { ++ msglen)) { + if (ret == 0) + ret = -EFAULT; + break; +@@ -1257,8 +1253,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + (size_t)args.buf + ret * + sizeof(struct vchiq_completion_data)), + completion, +- sizeof(struct vchiq_completion_data)) +- != 0) { ++ sizeof(struct vchiq_completion_data))) { + if (ret == 0) + ret = -EFAULT; + break; +@@ -1278,13 +1273,13 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + &((struct vchiq_await_completion *)arg) + ->msgbufcount, + &msgbufcount, +- sizeof(msgbufcount)) != 0) { ++ sizeof(msgbufcount))) { + ret = -EFAULT; + } + } + } + +- if (ret != 0) ++ if (ret) + complete(&instance->remove_event); + mutex_unlock(&instance->completion_mutex); + DEBUG_TRACE(AWAIT_COMPLETION_LINE); +@@ -1296,9 +1291,8 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + struct vchiq_header *header; + + DEBUG_TRACE(DEQUEUE_MESSAGE_LINE); +- if (copy_from_user +- (&args, (const void __user *)arg, +- sizeof(args)) != 0) { ++ if (copy_from_user(&args, (const void __user *)arg, ++ sizeof(args))) { + ret = -EFAULT; + break; + } +@@ -1384,7 +1378,7 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + struct vchiq_config config; + + if (copy_from_user(&args, (const void __user *)arg, +- sizeof(args)) != 0) { ++ sizeof(args))) { + ret = -EFAULT; + break; + } +@@ -1403,9 +1397,8 @@ vchiq_ioctl(struct file *file, unsigned int cmd, unsigned long arg) + case VCHIQ_IOC_SET_SERVICE_OPTION: { + struct vchiq_set_service_option args; + +- if (copy_from_user( +- &args, (const void __user *)arg, +- sizeof(args)) != 0) { ++ if (copy_from_user(&args, (const void __user *)arg, ++ sizeof(args))) { + ret = -EFAULT; + break; + } +@@ -2329,8 +2322,7 @@ vchiq_keepalive_thread_func(void *v) + while (1) { + long rc = 0, uc = 0; + +- if (wait_for_completion_interruptible(&arm_state->ka_evt) +- != 0) { ++ if (wait_for_completion_interruptible(&arm_state->ka_evt)) { + vchiq_log_error(vchiq_susp_log_level, + "%s interrupted", __func__); + flush_signals(current); +@@ -3011,7 +3003,7 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service, + vchiq_log_info(vchiq_susp_log_level, "%s %s resume " + "blocked - waiting...", __func__, entity); + if (wait_for_completion_killable( +- &arm_state->resume_blocker) != 0) { ++ &arm_state->resume_blocker)) { + vchiq_log_error(vchiq_susp_log_level, "%s %s " + "wait for resume blocker interrupted", + __func__, entity); +@@ -3060,7 +3052,7 @@ vchiq_use_internal(struct vchiq_state *state, struct vchiq_service *service, + vchiq_log_info(vchiq_susp_log_level, "%s %s wait for resume", + __func__, entity); + if (wait_for_completion_killable( +- &arm_state->vc_resume_complete) != 0) { ++ &arm_state->vc_resume_complete)) { + vchiq_log_error(vchiq_susp_log_level, "%s %s wait for " + "resume interrupted", __func__, entity); + ret = VCHIQ_ERROR; +@@ -3505,13 +3497,13 @@ static int vchiq_probe(struct platform_device *pdev) + platform_set_drvdata(pdev, drvdata); + + err = vchiq_platform_init(pdev, &g_state); +- if (err != 0) ++ if (err) + goto failed_platform_init; + + cdev_init(&vchiq_cdev, &vchiq_fops); + vchiq_cdev.owner = THIS_MODULE; + err = cdev_add(&vchiq_cdev, vchiq_devid, 1); +- if (err != 0) { ++ if (err) { + vchiq_log_error(vchiq_arm_log_level, + "Unable to register device"); + goto failed_platform_init; +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_connected.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_connected.c +index e87e6619695e..1640906e3929 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_connected.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_connected.c +@@ -41,7 +41,7 @@ void vchiq_add_connected_callback(VCHIQ_CONNECTED_CALLBACK_T callback) + { + connected_init(); + +- if (mutex_lock_killable(&g_connected_mutex) != 0) ++ if (mutex_lock_killable(&g_connected_mutex)) + return; + + if (g_connected) +@@ -76,7 +76,7 @@ void vchiq_call_connected_callbacks(void) + + connected_init(); + +- if (mutex_lock_killable(&g_connected_mutex) != 0) ++ if (mutex_lock_killable(&g_connected_mutex)) + return; + + for (i = 0; i < g_num_deferred_callbacks; i++) +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c +index 44bfa890e0e5..44f0eb64952a 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c +@@ -800,7 +800,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service, + WARN_ON(!(stride <= VCHIQ_SLOT_SIZE)); + + if (!(flags & QMFLAGS_NO_MUTEX_LOCK) && +- (mutex_lock_killable(&state->slot_mutex) != 0)) ++ mutex_lock_killable(&state->slot_mutex)) + return VCHIQ_RETRY; + + if (type == VCHIQ_MSG_DATA) { +@@ -812,8 +812,8 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service, + return VCHIQ_ERROR; + } + +- WARN_ON((flags & (QMFLAGS_NO_MUTEX_LOCK | +- QMFLAGS_NO_MUTEX_UNLOCK)) != 0); ++ WARN_ON(flags & (QMFLAGS_NO_MUTEX_LOCK | ++ QMFLAGS_NO_MUTEX_UNLOCK)); + + if (service->closing) { + /* The service has been closed */ +@@ -874,7 +874,7 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service, + return VCHIQ_RETRY; + if (service->closing) + return VCHIQ_ERROR; +- if (mutex_lock_killable(&state->slot_mutex) != 0) ++ if (mutex_lock_killable(&state->slot_mutex)) + return VCHIQ_RETRY; + if (service->srvstate != VCHIQ_SRVSTATE_OPEN) { + /* The service has been closed */ +@@ -912,8 +912,8 @@ queue_message(struct vchiq_state *state, struct vchiq_service *service, + header, size, VCHIQ_MSG_SRCPORT(msgid), + VCHIQ_MSG_DSTPORT(msgid)); + +- WARN_ON((flags & (QMFLAGS_NO_MUTEX_LOCK | +- QMFLAGS_NO_MUTEX_UNLOCK)) != 0); ++ WARN_ON(flags & (QMFLAGS_NO_MUTEX_LOCK | ++ QMFLAGS_NO_MUTEX_UNLOCK)); + + callback_result = + copy_message_data(copy_callback, context, +@@ -1040,8 +1040,8 @@ queue_message_sync(struct vchiq_state *state, struct vchiq_service *service, + + local = state->local; + +- if ((VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_RESUME) && +- (mutex_lock_killable(&state->sync_mutex) != 0)) ++ if (VCHIQ_MSG_TYPE(msgid) != VCHIQ_MSG_RESUME && ++ mutex_lock_killable(&state->sync_mutex)) + return VCHIQ_RETRY; + + remote_event_wait(&state->sync_release_event, &local->sync_release); +@@ -1718,8 +1718,7 @@ parse_rx_slots(struct vchiq_state *state) + &service->bulk_rx : &service->bulk_tx; + + DEBUG_TRACE(PARSE_LINE); +- if (mutex_lock_killable( +- &service->bulk_mutex) != 0) { ++ if (mutex_lock_killable(&service->bulk_mutex)) { + DEBUG_TRACE(PARSE_LINE); + goto bail_not_ready; + } +@@ -2523,7 +2522,7 @@ do_abort_bulks(struct vchiq_service *service) + VCHIQ_STATUS_T status; + + /* Abort any outstanding bulk transfers */ +- if (mutex_lock_killable(&service->bulk_mutex) != 0) ++ if (mutex_lock_killable(&service->bulk_mutex)) + return 0; + abort_outstanding_bulks(service, &service->bulk_tx); + abort_outstanding_bulks(service, &service->bulk_rx); +@@ -3038,7 +3037,7 @@ VCHIQ_STATUS_T vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, + queue = (dir == VCHIQ_BULK_TRANSMIT) ? + &service->bulk_tx : &service->bulk_rx; + +- if (mutex_lock_killable(&service->bulk_mutex) != 0) { ++ if (mutex_lock_killable(&service->bulk_mutex)) { + status = VCHIQ_RETRY; + goto error_exit; + } +@@ -3052,8 +3051,7 @@ VCHIQ_STATUS_T vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, + status = VCHIQ_RETRY; + goto error_exit; + } +- if (mutex_lock_killable(&service->bulk_mutex) +- != 0) { ++ if (mutex_lock_killable(&service->bulk_mutex)) { + status = VCHIQ_RETRY; + goto error_exit; + } +@@ -3081,7 +3079,7 @@ VCHIQ_STATUS_T vchiq_bulk_transfer(VCHIQ_SERVICE_HANDLE_T handle, + + /* The slot mutex must be held when the service is being closed, so + claim it here to ensure that isn't happening */ +- if (mutex_lock_killable(&state->slot_mutex) != 0) { ++ if (mutex_lock_killable(&state->slot_mutex)) { + status = VCHIQ_RETRY; + goto cancel_bulk_error_exit; + } +diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c +index 2bb9120883fd..f217b78d95a0 100644 +--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c ++++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c +@@ -86,7 +86,7 @@ static ssize_t debugfs_log_write(struct file *file, + if (count >= DEBUGFS_WRITE_BUF_SIZE) + count = DEBUGFS_WRITE_BUF_SIZE; + +- if (copy_from_user(kbuf, buffer, count) != 0) ++ if (copy_from_user(kbuf, buffer, count)) + return -EFAULT; + kbuf[count - 1] = 0; + +@@ -151,7 +151,7 @@ static ssize_t debugfs_trace_write(struct file *file, + VCHIQ_INSTANCE_T instance = f->private; + char firstchar; + +- if (copy_from_user(&firstchar, buffer, 1) != 0) ++ if (copy_from_user(&firstchar, buffer, 1)) + return -EFAULT; + + switch (firstchar) { -- cgit