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V4L/DVB (6343): ivtvfb: check return value of unregister_framebuffer

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Prevent unloading the framebuffer if it is still in use.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2007-10-14 11:17:14 -03:00 committed by Mauro Carvalho Chehab
parent 18e16f9c95
commit d343d7f979
1 changed files with 4 additions and 1 deletions
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5
drivers/media/video/ivtv/ivtvfb.c
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@ -1169,9 +1169,12 @@ static void ivtvfb_cleanup(void)
for (i = 0; i < ivtv_cards_active; i++) {
itv = ivtv_cards[i];
if (itv && (itv->v4l2_cap & V4L2_CAP_VIDEO_OUTPUT) && itv->osd_info) {
if (unregister_framebuffer(&itv->osd_info->ivtvfb_info)) {
IVTVFB_WARN("Framebuffer %d is in use, cannot unload\n", i);
return;
}
IVTVFB_DEBUG_INFO("Unregister framebuffer %d\n", i);
ivtvfb_blank(FB_BLANK_POWERDOWN, &itv->osd_info->ivtvfb_info);
unregister_framebuffer(&itv->osd_info->ivtvfb_info);
ivtvfb_release_buffers(itv);
itv->osd_video_pbase = 0;
}