From 6fd17b5643bf05c29fc226a5aee96328056fca10 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Mon, 18 Apr 2011 12:04:17 -0400 Subject: [PATCH] xen/blkback: Get the 'requeust_queue' properly. After the commit 0faa8cca883bbc6a0919e3c89128672659b75820 (" xen/blkback: remove per-queue plugging") we forgot to retrieve the 'struct request_queue' from the block device. This puts the functionality back in and fixes a NULL pointer bug. Signed-off-by: Konrad Rzeszutek Wilk --- drivers/xen/blkback/blkback.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/xen/blkback/blkback.c b/drivers/xen/blkback/blkback.c index a0d3227..3751325 100644 --- a/drivers/xen/blkback/blkback.c +++ b/drivers/xen/blkback/blkback.c @@ -542,6 +542,9 @@ static void dispatch_rw_block_io(struct blkif_st *blkif, goto fail_response; } } + q = bdev_get_queue(preq.bdev); + if (!q) + goto fail_response; /* If we have failed at this point, we need to undo the M2P override, * set gnttab_set_unmap_op on all of the grant references and perform * the hypercall to unmap the grants - that is all done in -- 2.7.4