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sd: Avoid access to NULL BlockDriverState 

Commit 4f8a066b5f (blockdev: Remove IF_*
check for read-only blockdev_init) added a usage of bdrv_is_read_only()
to sd_init(), which is called for versatilepb, versatileab and
xilinx-zynq-a9 machines among others with NULL argument by default,
causing the new qom-test to fail.

Add a check to prevent this.

Suggested-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Andreas Färber 2013-10-16 15:24:01 +02:00 committed by Stefan Hajnoczi
parent 684b25447c
commit 794cbc26eb
1 changed files with 1 additions and 1 deletions
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2
hw/sd/sd.c
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@ -494,7 +494,7 @@ SDState *sd_init(BlockDriverState *bs, bool is_spi)
{
SDState *sd;
if (bdrv_is_read_only(bs)) {
if (bs && bdrv_is_read_only(bs)) {
fprintf(stderr, "sd_init: Cannot use read-only drive\n");
return NULL;
}