diff options
Diffstat (limited to '0001-uas-Limit-qdepth-at-the-scsi-host-level.patch')
| -rw-r--r-- | 0001-uas-Limit-qdepth-at-the-scsi-host-level.patch | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/0001-uas-Limit-qdepth-at-the-scsi-host-level.patch b/0001-uas-Limit-qdepth-at-the-scsi-host-level.patch new file mode 100644 index 000000000..b6c446829 --- /dev/null +++ b/0001-uas-Limit-qdepth-at-the-scsi-host-level.patch @@ -0,0 +1,45 @@ +From 79abe2bd501d628b165f323098d6972d69bd13d7 Mon Sep 17 00:00:00 2001 +From: Hans de Goede <hdegoede@redhat.com> +Date: Wed, 16 Mar 2016 13:20:51 +0100 +Subject: [PATCH] uas: Limit qdepth at the scsi-host level + +Commit 64d513ac31bd ("scsi: use host wide tags by default") causes +the scsi-core to queue more cmnds then we can handle on devices with +multiple LUNs, limit the qdepth at the scsi-host level instead of +per slave to fix this. + +BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1315013 +Cc: stable@vger.kernel.org # 4.4.x and 4.5.x +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +--- + drivers/usb/storage/uas.c | 7 ++++++- + 1 file changed, 6 insertions(+), 1 deletion(-) + +diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c +index c90a7e4..b5cb7ab 100644 +--- a/drivers/usb/storage/uas.c ++++ b/drivers/usb/storage/uas.c +@@ -800,7 +800,6 @@ static int uas_slave_configure(struct scsi_device *sdev) + if (devinfo->flags & US_FL_BROKEN_FUA) + sdev->broken_fua = 1; + +- scsi_change_queue_depth(sdev, devinfo->qdepth - 2); + return 0; + } + +@@ -932,6 +931,12 @@ static int uas_probe(struct usb_interface *intf, const struct usb_device_id *id) + if (result) + goto set_alt0; + ++ /* ++ * 1 tag is reserved for untagged commands + ++ * 1 tag to avoid of by one errors in some bridge firmwares ++ */ ++ shost->can_queue = devinfo->qdepth - 2; ++ + usb_set_intfdata(intf, shost); + result = scsi_add_host(shost, &intf->dev); + if (result) +-- +2.7.3 + |