media: ov13858: Check for possible null pointer

Check for possible null pointer to avoid crash.

Signed-off-by: Chiranjeevi Rapolu <chiranjeevi.rapolu@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

diff --git a/drivers/media/i2c/ov13858.c b/drivers/media/i2c/ov13858.c
index c8bbc1f..45bb872 100644 (file)
--- a/drivers/media/i2c/ov13858.c
+++ b/drivers/media/i2c/ov13858.c
@@ -1612,7 +1612,8 @@ static int ov13858_init_controls(struct ov13858 *ov13858)
                                OV13858_NUM_OF_LINK_FREQS - 1,
                                0,
                                link_freq_menu_items);
-       ov13858->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+       if (ov13858->link_freq)
+               ov13858->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 
        pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
        pixel_rate_min = link_freq_to_pixel_rate(link_freq_menu_items[1]);
@@ -1635,7 +1636,8 @@ static int ov13858_init_controls(struct ov13858 *ov13858)
        ov13858->hblank = v4l2_ctrl_new_std(
                                ctrl_hdlr, &ov13858_ctrl_ops, V4L2_CID_HBLANK,
                                hblank, hblank, 1, hblank);
-       ov13858->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+       if (ov13858->hblank)
+               ov13858->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
 
        exposure_max = mode->vts_def - 8;
        ov13858->exposure = v4l2_ctrl_new_std(