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UAS: Limit max number of requests over USB-2 to 32 (rhbz#1128472)

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Hans de Goede 2014-08-14 15:23:45 +02:00
parent a30126f811
commit 29e3dad504
2 changed files with 45 additions and 0 deletions
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36
0001-uas-Limit-qdepth-to-32-when-connected-over-usb-2.patch Normal file
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@ -0,0 +1,36 @@
From 86da2d12cf6f76b1fa487f7acf3995f058a2e516 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 1 Aug 2014 17:27:49 +0200
Subject: [PATCH v2 1/2] uas: Limit qdepth to 32 when connected over usb-2
Some jmicron uas chipsets act up (they disconnect from the bus) when sending
more then 32 commands to them at once.
Rather then building an ever growing list with usb-id based quirks for
devices using this chipset, simply reduce the qdepth to 32 when connected
over usb-2. 32 should be plenty to keep things close to maximum
possible throughput on usb-2.
Cc: stable@vger.kernel.org
Tested-and-reported-by: Laszlo T. <tlacix@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/usb/storage/uas.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 511b229..3f42785 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -1026,7 +1026,7 @@ static int uas_configure_endpoints(struct uas_dev_info *devinfo)
usb_endpoint_num(&eps[3]->desc));
if (udev->speed != USB_SPEED_SUPER) {
- devinfo->qdepth = 256;
+ devinfo->qdepth = 32;
devinfo->use_streams = 0;
} else {
devinfo->qdepth = usb_alloc_streams(devinfo->intf, eps + 1,
--
2.0.4

9
kernel.spec
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@ -763,6 +763,9 @@ Patch25129: 0002-ALSA-hda-Add-a-fixup-for-Thinkpad-T540p.patch
#CVE-2014-{5206,5207} rhbz 1129662 1129669
Patch25130: namespaces-remount-fixes.patch
#rhbz 1128472
Patch25131: 0001-uas-Limit-qdepth-to-32-when-connected-over-usb-2.patch
# END OF PATCH DEFINITIONS
%endif
@ -1485,6 +1488,9 @@ ApplyPatch 0002-ALSA-hda-Add-a-fixup-for-Thinkpad-T540p.patch
#CVE-2014-{5206,5207} rhbz 1129662 1129669
ApplyPatch namespaces-remount-fixes.patch
#rhbz 1128472
ApplyPatch 0001-uas-Limit-qdepth-to-32-when-connected-over-usb-2.patch
# END OF PATCH APPLICATIONS
%endif
@ -2296,6 +2302,9 @@ fi
# ||----w |
# || ||
%changelog
* Thu Aug 14 2014 Hans de Goede <hdegoede@redhat.com>
- UAS: Limit max number of requests over USB-2 to 32 (rhbz#1128472)
* Wed Aug 13 2014 Justin M. Forbes <jforbes@fedoraproject.org> 3.15.9-201
- Bump for build