[Intel-gfx] [PATCH 2/2] drm/i915: properly prefault for pread/pwrite

[Keith Packard]

On Sun, 23 Oct 2011 12:18:30 +0200, Daniel Vetter <daniel at ffwll.ch> wrote:
> Hi Keith,
> 
> This patch isn't in your -next pull. This papers over a spurious -EFAULT
> in the pwrite/pread paths that actually gets hit in the wild. The real fix
> in the form of a almost complete rewrite of the pwrite/pread paths won't
> be ready for 3.2.

We had several comments wondering whether writing zeros was OK as this
occurs before some potential error returns that should leave the buffer
unmodified. I didn't have a better suggestion, but that seems pretty
sketchy to me.

-- 
keith.packard at intel.com
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