linux-kernel - [PATCH 4.15 54/84] media: davinci: fix a debug printk

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Date:   Fri, 23 Mar 2018 10:54:08 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab@...pensource.com>,
        "Lad, Prabhakar" <prabhakar.csengg@...il.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.15 54/84] media: davinci: fix a debug printk

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mauro Carvalho Chehab <mchehab@...pensource.com>


[ Upstream commit 4f6c11044f512356cb63d3df0f3b38db79dc6736 ]

Two orthogonal changesets caused a breakage at a printk
inside davinci. Commit a2d17962c9ca
("[media] davinci: Switch from V4L2 OF to V4L2 fwnode")
made davinci to use struct fwnode_handle instead of
struct device_node. Commit 68d9c47b1679
("media: Convert to using %pOF instead of full_name")
changed the printk to not use ->full_name, but, instead,
to rely on %pOF.

With both patches applied, the Kernel will do the wrong
thing, as warned by smatch:
	drivers/media/platform/davinci/vpif_capture.c:1399 vpif_async_bound() error: '%pOF' expects argument of type 'struct device_node*', argument 5 has type 'void*'

So, change the logic to actually print the device name
that was obtained before the print logic.

Fixes: 68d9c47b1679 ("media: Convert to using %pOF instead of full_name")
Fixes: a2d17962c9ca ("[media] davinci: Switch from V4L2 OF to V4L2 fwnode")

Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
Acked-by: Lad, Prabhakar <prabhakar.csengg@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/media/platform/davinci/vpif_capture.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/media/platform/davinci/vpif_capture.c
+++ b/drivers/media/platform/davinci/vpif_capture.c
@@ -1397,9 +1397,9 @@ static int vpif_async_bound(struct v4l2_
 			vpif_obj.config->chan_config->inputs[i].subdev_name =
 				(char *)to_of_node(subdev->fwnode)->full_name;
 			vpif_dbg(2, debug,
-				 "%s: setting input %d subdev_name = %pOF\n",
+				 "%s: setting input %d subdev_name = %s\n",
 				 __func__, i,
-				 to_of_node(subdev->fwnode));
+				vpif_obj.config->chan_config->inputs[i].subdev_name);
 			return 0;
 		}
 	}