tree 638602a3d7726b27ae6ab85ef45f4f11c38c0283
parent 89712699d7bc9cc93602407e0e9bc2490b771400
author Guennadi Liakhovetski <g.liakhovetski@gmx.de> 1283498423 +0000
committer Paul Mundt <lethal@linux-sh.org> 1284452601 +0900

fbdev: sh_mobile_hdmi: implement locking

The SH-Mobile HDMI driver runs in several contexts: ISR, delayed work-queue,
task context, when called from the sh_mobile_lcdc framebuffer driver. This
creates ample race possibilities. Even though most these races are purely
theoretical, it is better to close them. To trace fb_info validity we install a
notification callback in the HDMI driver, and the only way for it to get to
driver internal data is by using struct sh_mobile_lcdc_chan, therefore it had
to be extracted into a separate common header.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>