xen: block: 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 <[email protected]>

Cc Konrad Rzeszutek Wilk <[email protected]>

Cc Boris Ostrovsky <[email protected]>

Cc David Vrabel <[email protected]>

Cc "Roger Pau Monné" <[email protected]>

---

Hi,

I am new to xen and reading related soure code, not sure whether this is correct. Please comments.

Thanks

 drivers/block/xen-blkfront.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

drivers/block/xen-blkfront.c +1 -1

index 0823a96..883b9fa 100644
@@ -2126,7 +2126,7 @@ static int __init xlblk_init(void)
 	if (xen_blkif_max_ring_order > XENBUS_MAX_RING_PAGE_ORDER) {
 		pr_info("Invalid max_ring_order (%d), will use default max: %d.\n",
 			xen_blkif_max_ring_order, XENBUS_MAX_RING_PAGE_ORDER);
-		xen_blkif_max_ring_order = 0;
+		xen_blkif_max_ring_order = XENBUS_MAX_RING_PAGE_ORDER;
 	}
 
 	if (!xen_has_pv_disk_devices())

Signature · 1 line

2.6.2

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 <[email protected]>

Cc Konrad Rzeszutek Wilk <[email protected]>

Cc Boris Ostrovsky <[email protected]>

Cc David Vrabel <[email protected]>

Cc "Roger Pau Monné" <[email protected]>

---

Hi,

I am new to xen and reading related soure code, not sure whether this is correct. Please comments.

Thanks

 drivers/block/xen-blkfront.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

drivers/block/xen-blkfront.c +1 -1

index 0823a96..883b9fa 100644
@@ -2126,7 +2126,7 @@ static int __init xlblk_init(void)
 	if (xen_blkif_max_ring_order > XENBUS_MAX_RING_PAGE_ORDER) {
 		pr_info("Invalid max_ring_order (%d), will use default max: %d.\n",
 			xen_blkif_max_ring_order, XENBUS_MAX_RING_PAGE_ORDER);
-		xen_blkif_max_ring_order = 0;
+		xen_blkif_max_ring_order = XENBUS_MAX_RING_PAGE_ORDER;
 	}
 
 	if (!xen_has_pv_disk_devices())

Signature · 1 line

2.6.2