linux-kernel - [PATCH] nfc: s3fwrn5: fix uninitialized ERRNO variable in probe error message

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Message-Id: <20210728122808.156961-1-krzysztof.kozlowski@canonical.com>
Date:   Wed, 28 Jul 2021 14:28:08 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Krzysztof Opasiak <k.opasiak@...sung.com>,
        wengjianfeng <wengjianfeng@...ong.com>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Cc:     kbuild-all@...ts.01.org, kernel test robot <lkp@...el.com>
Subject: [PATCH] nfc: s3fwrn5: fix uninitialized ERRNO variable in probe error message

Commit a0302ff5906a ("nfc: s3fwrn5: remove unnecessary label") removed
assignment to "ret" variable but it is used right after in dev_err() in
the error path.  This fixes clang warning:

    drivers/nfc/s3fwrn5/firmware.c:424:3: warning: 3rd function call argument is an uninitialized value [clang-analyzer-core.CallAndMessage]

Fixes: a0302ff5906a ("nfc: s3fwrn5: remove unnecessary label")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>

---

Commit hash a0302ff5906a from net-next (not Linus' tree).
---
 drivers/nfc/s3fwrn5/firmware.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nfc/s3fwrn5/firmware.c b/drivers/nfc/s3fwrn5/firmware.c
index 1421ffd46d9a..1e506f6be96e 100644
--- a/drivers/nfc/s3fwrn5/firmware.c
+++ b/drivers/nfc/s3fwrn5/firmware.c
@@ -421,9 +421,10 @@ int s3fwrn5_fw_download(struct s3fwrn5_fw_info *fw_info)
 
 	tfm = crypto_alloc_shash("sha1", 0, 0);
 	if (IS_ERR(tfm)) {
+		ret = PTR_ERR(tfm);
 		dev_err(&fw_info->ndev->nfc_dev->dev,
 			"Cannot allocate shash (code=%d)\n", ret);
-		return PTR_ERR(tfm);
+		return ret;
 	}
 
 	ret = crypto_shash_tfm_digest(tfm, fw->image, image_size, hash_data);
-- 
2.27.0