linux-kernel - [PATCH] media: davinci: vpif: add check for NULL handler

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Date:	Thu, 16 Aug 2012 19:32:00 +0530
From:	Prabhakar Lad <prabhakar.lad@...com>
To:	LMML <linux-media@...r.kernel.org>
CC:	dlos <davinci-linux-open-source@...ux.davincidsp.com>,
	<linux-kernel@...r.kernel.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	"Lad, Prabhakar" <prabhakar.lad@...com>,
	Manjunath Hadli <manjunath.hadli@...com>,
	Hans Verkuil <hans.verkuil@...co.com>
Subject: [PATCH] media: davinci: vpif: add check for NULL handler

From: Lad, Prabhakar <prabhakar.lad@...com>

Signed-off-by: Lad, Prabhakar <prabhakar.lad@...com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@...com>
Cc: Hans Verkuil <hans.verkuil@...co.com>
---
 drivers/media/video/davinci/vpif_capture.c |   12 +++++++-----
 drivers/media/video/davinci/vpif_display.c |   14 ++++++++------
 2 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/media/video/davinci/vpif_capture.c b/drivers/media/video/davinci/vpif_capture.c
index 266025e..a87b7a5 100644
--- a/drivers/media/video/davinci/vpif_capture.c
+++ b/drivers/media/video/davinci/vpif_capture.c
@@ -311,12 +311,14 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 	}
 
 	/* configure 1 or 2 channel mode */
-	ret = vpif_config_data->setup_input_channel_mode
-					(vpif->std_info.ycmux_mode);
+	if (vpif_config_data->setup_input_channel_mode) {
+		ret = vpif_config_data->setup_input_channel_mode
+						(vpif->std_info.ycmux_mode);
 
-	if (ret < 0) {
-		vpif_dbg(1, debug, "can't set vpif channel mode\n");
-		return ret;
+		if (ret < 0) {
+			vpif_dbg(1, debug, "can't set vpif channel mode\n");
+			return ret;
+		}
 	}
 
 	/* Call vpif_set_params function to set the parameters and addresses */
diff --git a/drivers/media/video/davinci/vpif_display.c b/drivers/media/video/davinci/vpif_display.c
index e129c98..1e35f92 100644
--- a/drivers/media/video/davinci/vpif_display.c
+++ b/drivers/media/video/davinci/vpif_display.c
@@ -280,12 +280,14 @@ static int vpif_start_streaming(struct vb2_queue *vq, unsigned int count)
 	}
 
 	/* clock settings */
-	ret =
-	    vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode,
-					ch->vpifparams.std_info.hd_sd);
-	if (ret < 0) {
-		vpif_err("can't set clock\n");
-		return ret;
+	if (vpif_config_data->set_clock) {
+		ret =
+		vpif_config_data->set_clock(ch->vpifparams.std_info.ycmux_mode,
+						ch->vpifparams.std_info.hd_sd);
+		if (ret < 0) {
+			vpif_err("can't set clock\n");
+			return ret;
+		}
 	}
 
 	/* set the parameters and addresses */
-- 
1.7.0.4

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