USB: uas: Reduce can_queue to MAX_CMNDS

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commit 55ff8cfbc4 upstream.

The uas driver can never queue more then MAX_CMNDS (- 1) tags and tags
are shared between luns, so there is no need to claim that we can_queue
some random large number.

Not claiming that we can_queue 65536 commands, fixes the uas driver
failing to initialize while allocating the tag map with a "Page allocation
failure (order 7)" error on systems which have been running for a while
and thus have fragmented memory.

Reported-and-tested-by: Yves-Alexis Perez <corsac@corsac.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.16: add definition of MAX_CMNDS from upstream commit
 5e61aede47 ("uas: Do not use scsi_host_find_tag")]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

...

This commit is contained in:

Hans de Goede 2016-03-07 20:11:52 +01:00 • committed by Ben Hutchings

parent 81a64abca5

commit 2e79fd3ecd

1 changed files with 4 additions and 2 deletions

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drivers/usb/storage/uas.c

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