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vpc: Return 0 from vpc_co_create() on success 

blockdev_create_run() directly uses .bdrv_co_create()'s return value as
the job's return value.  Jobs must return 0 on success, not just any
nonnegative value.  Therefore, using blockdev-create for VPC images may
currently fail as the vpc driver may return a positive integer.

Because there is no point in returning a positive integer anywhere in
the block layer (all non-negative integers are generally treated as
complete success), we probably do not want to add more such cases.
Therefore, fix this problem by making the vpc driver always return 0 in
case of success.

Suggested-by: Kevin Wolf <kwolf@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
master
Max Reitz 2019-09-02 21:33:16 +02:00 committed by Kevin Wolf
parent effecce6bc
commit 1a37e31244
1 changed files with 2 additions and 1 deletions
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3
block/vpc.c
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@ -885,6 +885,7 @@ static int create_dynamic_disk(BlockBackend *blk, uint8_t *buf,
goto fail;
}
ret = 0;
fail:
return ret;
}
@ -908,7 +909,7 @@ static int create_fixed_disk(BlockBackend *blk, uint8_t *buf,
return ret;
}
return ret;
return 0;
}
static int calculate_rounded_image_size(BlockdevCreateOptionsVpc *vpc_opts,