Commit 87884bd8 authored Dec 19, 2008 by Magnus Damm Committed by Paul Mundt Dec 22, 2008

video: fix deferred io fsync()



If CONFIG_FB_DEFERRED_IO is set, but there are framebuffers
registered that does not make use of deferred io, then fsync()
on those framebuffers will result in a crash. Fix that.

This is needed for sh_mobile_lcdcfb since we always enable
deferred io at compile time but we may disable deferred io
for some types of hardware configurations.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Acked-by: Jaya Kumar <jayakumar.lkml@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

parent 07905554

drivers/video/fb_defio.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -60,6 +60,10 @@ int fb_deferred_io_fsync(struct file file, struct dentry dentry, int datasync)
		{
		struct fb_info *info = file->private_data;

		/* Skip if deferred io is complied-in but disabled on this fbdev */
		if (!info->fbdefio)
		return 0;

		/* Kill off the delayed work */
		cancel_rearming_delayed_work(&info->deferred_work);