From: Nicholas Mc Guire <der.herr@hofr.at>
To: Alexey Khoroshilov <khoroshilov@ispras.ru>
Cc: Mats Randgaard <matrandg@cisco.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
ldv-project@linuxtesting.org, sil2review@lists.osadl.org,
linux-kernel@vger.kernel.org, Julia Lawall <julia.lawall@lip6.fr>,
linux-media@vger.kernel.org
Subject: Re: [SIL2review] [PATCH] media: tc358743: release device_node in tc358743_probe_of()
Date: Sat, 26 May 2018 14:38:34 +0000 [thread overview]
Message-ID: <20180526143834.GA28325@osadl.at> (raw)
In-Reply-To: <1527285240-12762-1-git-send-email-khoroshilov@ispras.ru>
On Sat, May 26, 2018 at 12:54:00AM +0300, Alexey Khoroshilov wrote:
> of_graph_get_next_endpoint() returns device_node with refcnt increased,
> but these is no of_node_put() for it.
I think this is correct - but would it not be simpler to do
endpoint = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep));
of_node_put(ep);
if (IS_ERR(endpoint)) {
....
As the of_node_put(np) actually is unconditional anyway I think this
should be semantically equivalent.
>
> The patch adds one on error and normal paths.
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Reviewed-by: Nicholas Mc Guire <der.herr@hofr.at>
> ---
> drivers/media/i2c/tc358743.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/tc358743.c b/drivers/media/i2c/tc358743.c
> index 393bbbbbaad7..44c41933415a 100644
> --- a/drivers/media/i2c/tc358743.c
> +++ b/drivers/media/i2c/tc358743.c
> @@ -1918,7 +1918,8 @@ static int tc358743_probe_of(struct tc358743_state *state)
> endpoint = v4l2_fwnode_endpoint_alloc_parse(of_fwnode_handle(ep));
> if (IS_ERR(endpoint)) {
> dev_err(dev, "failed to parse endpoint\n");
> - return PTR_ERR(endpoint);
> + ret = PTR_ERR(endpoint);
> + goto put_node;
> }
>
> if (endpoint->bus_type != V4L2_MBUS_CSI2 ||
> @@ -2013,6 +2014,8 @@ static int tc358743_probe_of(struct tc358743_state *state)
> clk_disable_unprepare(refclk);
> free_endpoint:
> v4l2_fwnode_endpoint_free(endpoint);
> +put_node:
> + of_node_put(ep);
> return ret;
> }
> #else
> --
> 2.7.4
>
> _______________________________________________
> SIL2review mailing list
> SIL2review@lists.osadl.org
> https://lists.osadl.org/mailman/listinfo/sil2review
next prev parent reply other threads:[~2018-05-26 14:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-25 21:54 Alexey Khoroshilov
2018-05-26 14:38 ` Nicholas Mc Guire [this message]
2018-06-02 22:11 ` [SIL2review] " Alexey Khoroshilov
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