linux-kernel - [PATCH 5.2 45/61] coresight: Potential uninitialized variable in probe()

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Message-Id: <20190712121623.044961135@linuxfoundation.org>
Date:   Fri, 12 Jul 2019 14:19:58 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Mathieu Poirier <mathieu.poirier@...aro.org>
Subject: [PATCH 5.2 45/61] coresight: Potential uninitialized variable in probe()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit 0530ef6b41e80c5cc979e0e50682302161edb6b7 upstream.

The "drvdata->atclk" clock is optional, but if it gets set to an error
pointer then we're accidentally return an uninitialized variable instead
of success.

Fixes: 78e6427b4e7b ("coresight: funnel: Support static funnel")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
Cc: stable <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/20190620221237.3536-6-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/hwtracing/coresight/coresight-funnel.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -241,6 +241,7 @@ static int funnel_probe(struct device *d
 	}
 
 	pm_runtime_put(dev);
+	ret = 0;
 
 out_disable_clk:
 	if (ret && !IS_ERR_OR_NULL(drvdata->atclk))