Add a patch to filter false positive kbd backlight change events (#1514969)

Add a patch to disable runtime-pm for QCA bluetooth devices (#1514836)

1 files changed, 47 insertions, 0 deletions

diff --git a/0001-Bluetooth-btusb-Disable-autosuspend-on-QCA-Rome-devi.patch b/0001-Bluetooth-btusb-Disable-autosuspend-on-QCA-Rome-devi.patch
new file mode 100644
index 000000000..cc1af2ceb
--- /dev/null
+++ b/0001-Bluetooth-btusb-Disable-autosuspend-on-QCA-Rome-devi.patch
@@ -0,0 +1,47 @@
+From a5ffa27c07e06900fcfc50b08de6d11e45830168 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Wed, 3 Jan 2018 12:49:44 +0100
+Subject: [PATCH v2] Bluetooth: btusb: Disable autosuspend on QCA Rome devices
+
+Commit fd865802c66b ("Bluetooth: btusb: fix QCA Rome suspend/resume") fixes
+a suspend/resume problem on QCA devices by doing a full reset on resume,
+reloading the firmware.
+
+A similar problem happens when using runtime-pm / autosuspend, when this is
+enabled by the user the QCA Rome device stops working. Reloading the
+firmware after a runtime suspend is not really an option since the latency
+caused by this is unacceptable.
+
+To fix the runtime-pm issues, this commit disables runtime-pm on QCA Rome
+HCIs, by getting (and not releasing) an usb autopm reference on the btusb
+interface.
+
+BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1514836
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/bluetooth/btusb.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
+index 808c249845db..6ed3a0e5b8f6 100644
+--- a/drivers/bluetooth/btusb.c
++++ b/drivers/bluetooth/btusb.c
+@@ -3122,8 +3122,15 @@ static int btusb_probe(struct usb_interface *intf,
+ 		/* QCA Rome devices lose their updated firmware over suspend,
+ 		 * but the USB hub doesn't notice any status change.
+ 		 * Explicitly request a device reset on resume.
++		 * And disable runtime pm by getting a pm reference, the USB
++		 * core will drop our reference on disconnect.
+ 		 */
+ 		set_bit(BTUSB_RESET_RESUME, &data->flags);
++		err = usb_autopm_get_interface(data->intf);
++		if (err < 0) {
++			BT_ERR("failed to get pm reference %d", err);
++			goto out_free_dev;
++		}
+ 	}
+ 
+ #ifdef CONFIG_BT_HCIBTUSB_RTL
+-- 
+2.14.3
+