USB: uas: Reduce can_queue to MAX_CMNDS
authorHans de Goede <hdegoede@redhat.com>
Mon, 7 Mar 2016 19:11:52 +0000 (20:11 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 18 Mar 2016 16:19:02 +0000 (09:19 -0700)
commit55ff8cfbc4e12a7d2187df523938cc671fbebdd1
tree4516e36572fa6e8e3cf8f4044df384289180b9de
parent8835ba4a39cf53f705417b3b3a94eb067673f2c9
USB: uas: Reduce can_queue to MAX_CMNDS

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.

Cc: stable@vger.kernel.org
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>
drivers/usb/storage/uas.c