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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>
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2
block.c
2
block.c
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@ -1084,8 +1084,8 @@ int bdrv_open(BlockDriverState *bs, const char *filename, QDict *options,
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snprintf(backing_filename, sizeof(backing_filename),
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"%s", filename);
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} else if (!realpath(filename, backing_filename)) {
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error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
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ret = -errno;
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error_setg_errno(errp, errno, "Could not resolve path '%s'", filename);
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goto fail;
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}
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