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-rw-r--r--drivers/xen/blkback/blkback.c3
1 files changed, 3 insertions, 0 deletions
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
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