From: Leo Yan <leo.yan@linaro.org>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH] coresight: potential uninitialized variable in probe()
Date: Thu, 13 Jun 2019 15:49:22 +0800 [thread overview]
Message-ID: <20190613074922.GB21113@leoy-ThinkPad-X240s> (raw)
In-Reply-To: <20190613065815.GF16334@mwanda>
Hi Dan,
On Wed, Jun 12, 2019 at 11:58:15PM -0700, Dan Carpenter wrote:
> 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.
You are right, thanks a lot for pointing out.
I'd like to initialize 'ret = 0' at the head of function, so we can
has the same fashion with other CoreSight drivers (e.g. replicator).
static int funnel_probe(struct device *dev, struct resource *res)
{
- int ret;
+ int ret = 0;
If you agree, could you send a new patch for this?
Thanks,
Leo Yan
> Fixes: 78e6427b4e7b ("coresight: funnel: Support static funnel")
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
> ---
> drivers/hwtracing/coresight/coresight-funnel.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
> index 5867fcb4503b..fa97cb9ab4f9 100644
> --- a/drivers/hwtracing/coresight/coresight-funnel.c
> +++ b/drivers/hwtracing/coresight/coresight-funnel.c
> @@ -244,6 +244,7 @@ static int funnel_probe(struct device *dev, struct resource *res)
> }
>
> pm_runtime_put(dev);
> + ret = 0;
>
> out_disable_clk:
> if (ret && !IS_ERR_OR_NULL(drvdata->atclk))
> --
> 2.20.1
>
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next prev parent reply other threads:[~2019-06-13 7:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-13 6:58 [PATCH] coresight: potential uninitialized variable in probe() Dan Carpenter
2019-06-13 7:49 ` Leo Yan [this message]
2019-06-13 8:14 ` Dan Carpenter
2019-06-13 9:56 ` Leo Yan
2019-06-13 10:10 ` Leo Yan
2019-06-17 19:27 ` Mathieu Poirier
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