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block: Save errno before error_setg_errno 

error_setg_errno() may overwrite errno; therefore, its value should be
read before calling that function and not afterwards.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Benoit Canet <benoit@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Max Reitz 2013-11-05 20:03:33 +01:00 committed by Stefan Hajnoczi
parent 43cd209803
commit 17826bc159
1 changed files with 1 additions and 1 deletions
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block.c
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@ -1084,8 +1084,8 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
snprintf(backing_filename, sizeof(backing_filename),
"%s", filename);
} else if (!realpath(filename, backing_filename)) {
error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
ret = -errno;
error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
goto fail;
}