leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

uas: Limit qdepth to 32 when connected over usb-2

Browse Source 
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Hans de Goede 2014-08-01 17:33:08 +02:00 committed by Greg Kroah-Hartman
parent 3dbef993c0
commit e2875c3378
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/storage/uas.c
View File

@ -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,