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xen/blkfront: correct setting for xen_blkif_max_ring_order 

According to this piece code:
"
     pr_info("Invalid max_ring_order (%d), will use default max: %d.\n",
              xen_blkif_max_ring_order, XENBUS_MAX_RING_GRANT_ORDER);
"
if xen_blkif_max_ring_order is bigger that XENBUS_MAX_RING_GRANT_ORDER,
need to set xen_blkif_max_ring_order using XENBUS_MAX_RING_GRANT_ORDER,
but not 0.

Signed-off-by: Peng Fan <van.freenix@gmail.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: "Roger Pau Monné" <roger.pau@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Peng Fan 2015-11-25 18:26:01 +08:00 committed by Konrad Rzeszutek Wilk
parent 73716df7da
commit 45fc82642e
1 changed files with 1 additions and 1 deletions
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2
drivers/block/xen-blkfront.c
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@ -2443,7 +2443,7 @@ static int __init xlblk_init(void)
if (xen_blkif_max_ring_order > XENBUS_MAX_RING_GRANT_ORDER) {
pr_info("Invalid max_ring_order (%d), will use default max: %d.\n",
xen_blkif_max_ring_order, XENBUS_MAX_RING_GRANT_ORDER);
xen_blkif_max_ring_order = 0;
xen_blkif_max_ring_order = XENBUS_MAX_RING_GRANT_ORDER;
}
if (xen_blkif_max_queues > nr_cpus) {