From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sat, 11 Oct 2014 22:53:35 +0000 (+0100)
Subject: drm/armada: fix page_flip refcounting leak
X-Git-Tag: omap-for-v3.19/fixes-not-urgent-part1~11^2~4^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c5488307dd679ea3fc23fec77dbf27191c2becda;p=pandora-kernel.git

drm/armada: fix page_flip refcounting leak

A refcounting leak was found of the original frame buffer attached to
the CRTC when using the page_flip ioctl, resulting in the frame buffer
never being freed.

This was not obvious initially, as if the page flip subsequently
re-attaches the original frame buffer, the refcounts will be balanced.
However, if the original frame buffer is freed, then it will be leaked.

Fix this by ensuring that we take a reference on the incoming fb, but
rely on the queued work to drop that ref count.

Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

Reading git-diff-tree failed