From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Sun, 30 Oct 2011 11:44:56 +0000 (+0100)
Subject: drm/i810: don't acces hw regs in lastclose
X-Git-Tag: v3.3-rc1~121^2~50^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=40c34d042dc2f8954d5f619f6348a8659a4b416f;p=pandora-kernel.git

drm/i810: don't acces hw regs in lastclose

i810 uses a userspace provided mmio map using the drm core map
infrastructure. By the time we reach lastclose, this is all gone
and our mmio_map pointer points at freed memory. Depending upon
luck that still works, most often it just oopses.

Aside: drm maps aren't refcounted, so userspace can essentially oops
the kernel any time it wants to. Who cares.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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