[PATCH 4.18 285/350] media: v4l2-tpg: fix kernel oops when enabling HFLIP and OSD

4.18-stable review patch. If anyone has any objections, please let me know. -- From: Hans Verkuil commit 250854eed5d45a73d81e4137dfd85180af6f2ec3 upstream. When the OSD is on (i.e. vivid displays text on top of the test pattern), and you enable hflip, then the driver crashes.

[PATCH 4.18 285/350] media: v4l2-tpg: fix kernel oops when enabling HFLIP and OSD

4.18-stable review patch. If anyone has any objections, please let me know. -- From: Hans Verkuil commit 250854eed5d45a73d81e4137dfd85180af6f2ec3 upstream. When the OSD is on (i.e. vivid displays text on top of the test pattern), and you enable hflip, then the driver crashes.