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xen/blkback: Get the 'requeust_queue' properly.

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After the commit 0faa8cca88
("    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 <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2011-04-18 12:04:17 -04:00
parent e93504933e
commit 6fd17b5643
1 changed files with 3 additions and 0 deletions
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3
drivers/xen/blkback/blkback.c
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@ -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