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/mt9v022.c b/drivers/media/video/mt9v022.c
index 3a39f0288599..82e1a3381a7a 100644
--- a/drivers/media/video/mt9v022.c
+++ b/drivers/media/video/mt9v022.c
@@ -690,6 +690,7 @@ static int mt9v022_set_control(struct soc_camera_device *icd,
 static int mt9v022_video_probe(struct soc_camera_device *icd)
 {
         struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
+        struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
         s32 data;
         int ret;
 
@@ -725,7 +726,7 @@ static int mt9v022_video_probe(struct soc_camera_device *icd)
                 ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
                 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
                 icd->formats = mt9v022_colour_formats;
-                if (mt9v022->client->dev.platform_data)
+                if (gpio_is_valid(icl->gpio))
                         icd->num_formats = ARRAY_SIZE(mt9v022_colour_formats);
                 else
                         icd->num_formats = 1;
@@ -733,7 +734,7 @@ static int mt9v022_video_probe(struct soc_camera_device *icd)
                 ret = reg_write(icd, MT9V022_PIXEL_OPERATION_MODE, 0x11);
                 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
                 icd->formats = mt9v022_monochrome_formats;
-                if (mt9v022->client->dev.platform_data)
+                if (gpio_is_valid(icl->gpio))
                         icd->num_formats = ARRAY_SIZE(mt9v022_monochrome_formats);
                 else
                         icd->num_formats = 1;