linux-kernel - [PATCH -next] test_firmware: fix missing unlock on error in config_num_requests

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Date:   Thu, 11 Jan 2018 11:12:55 +0000
From:   Wei Yongjun <weiyongjun1@...wei.com>
To:     Joe Perches <joe@...ches.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        "Zhang Rui" <rui.zhang@...el.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        "Andy Shevchenko" <andy.shevchenko@...il.com>
CC:     Wei Yongjun <weiyongjun1@...wei.com>,
        <linux-kernel@...r.kernel.org>, <kernel-janitors@...r.kernel.org>
Subject: [PATCH -next] test_firmware: fix missing unlock on error in config_num_requests_store()

Add the missing unlock before return from function
config_num_requests_store() in the error handling case.

Fixes: c92316bf8e94 ("test_firmware: add batched firmware tests")
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 lib/test_firmware.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/test_firmware.c b/lib/test_firmware.c
index 964784d..4647647 100644
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -371,6 +371,7 @@ static ssize_t config_num_requests_store(struct device *dev,
 	if (test_fw_config->reqs) {
 		pr_err("Must call release_all_firmware prior to changing config\n");
 		rc = -EINVAL;
+		mutex_unlock(&test_fw_mutex);
 		goto out;
 	}
 	mutex_unlock(&test_fw_mutex);