V4L/DVB (10066): mt9m001 mt9v022: fix bus-width switch GPIO availability test

Testing for non-NULL platform-data is not enough, we have to check if the GPIO
in the platform data is valid or not. Also see my earlier patch:

	[ARM] pxa/pcm990: use negative number for an invalid GPIO in camera data

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c
index 0bcfef7b1c17..a7f0e6971fe1 100644
--- a/drivers/media/video/mt9m001.c
+++ b/drivers/media/video/mt9m001.c
@@ -578,6 +578,7 @@ static int mt9m001_set_control(struct soc_camera_device *icd, struct v4l2_contro
 static int mt9m001_video_probe(struct soc_camera_device *icd)
 {
         struct mt9m001 *mt9m001 = container_of(icd, struct mt9m001, icd);
+        struct soc_camera_link *icl = mt9m001->client->dev.platform_data;
         s32 data;
         int ret;
 
@@ -600,7 +601,7 @@ static int mt9m001_video_probe(struct soc_camera_device *icd)
         case 0x8421:
                 mt9m001->model = V4L2_IDENT_MT9M001C12ST;
                 icd->formats = mt9m001_colour_formats;
-                if (mt9m001->client->dev.platform_data)
+                if (gpio_is_valid(icl->gpio))
                         icd->num_formats = ARRAY_SIZE(mt9m001_colour_formats);
                 else
                         icd->num_formats = 1;
@@ -608,7 +609,7 @@ static int mt9m001_video_probe(struct soc_camera_device *icd)
         case 0x8431:
                 mt9m001->model = V4L2_IDENT_MT9M001C12STM;
                 icd->formats = mt9m001_monochrome_formats;
-                if (mt9m001->client->dev.platform_data)
+                if (gpio_is_valid(icl->gpio))
                         icd->num_formats = ARRAY_SIZE(mt9m001_monochrome_formats);
                 else
                         icd->num_formats = 1;