From: Max Reitz <mre...@redhat.com>
Although virtually impossible right now, bdrv_find_format("qcow") may
fail. The vvfat block driver should heed that case.
Cc: qemu-sta...@nongnu.org
Signed-off-by: Max Reitz <mre...@redhat.com>
Reviewed-by: Kevin Wolf <kw...@redhat.com>
Signed-off-by: Kevin Wolf <kw...@redhat.com>
(cherry picked from commit 1bcb15cf776a57e8963072c1919a59a90aea8e94)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
block/vvfat.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/block/vvfat.c b/block/vvfat.c
index cefe3a4..e34a789 100644
--- a/block/vvfat.c
+++ b/block/vvfat.c
@@ -2917,6 +2917,12 @@ static int enable_write_target(BDRVVVFATState *s, Error
**errp)
}
bdrv_qcow = bdrv_find_format("qcow");
+ if (!bdrv_qcow) {
+ error_setg(errp, "Failed to locate qcow driver");
+ ret = -ENOENT;
+ goto err;
+ }
+
opts = qemu_opts_create(bdrv_qcow->create_opts, NULL, 0, &error_abort);
qemu_opt_set_number(opts, BLOCK_OPT_SIZE, s->sector_count * 512);
qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, "fat:");
--
1.9.1
