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>

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 44b096c1737b6548f5117144aff800c63d20b6d8..13e4cc31bc79e61a11539c42b8ea182b3dd6b3af 100644 (file)
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -836,7 +836,7 @@ static struct scsi_host_template uas_host_template = {
        .slave_configure = uas_slave_configure,
        .eh_abort_handler = uas_eh_abort_handler,
        .eh_bus_reset_handler = uas_eh_bus_reset_handler,
-       .can_queue = 65536,     /* Is there a limit on the _host_ ? */
+       .can_queue = MAX_CMNDS,
        .this_id = -1,
        .sg_tablesize = SG_NONE,
        .skip_settle_delay = 1,