From: Daniel Kurtz <djkurtz@chromium.org>
Date: Tue, 27 Mar 2012 18:36:14 +0000 (+0800)
Subject: drm/i915/intel_i2c: refactor using intel_gmbus_get_adapter
X-Git-Tag: v3.5-rc1~83^2~140^2~49
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3bd7d90938f1fe77de5991dc4b727843c4980b2a;p=pandora-kernel.git

drm/i915/intel_i2c: refactor using intel_gmbus_get_adapter

Instead of letting other modules directly access the ->gmbus array,
introduce intel_gmbus_get_adapter() for looking up an i2c_adapter
for a given gmbus port identifier.  This will enable later refactoring
of the gmbus port list.

Note: Before requesting an adapter for a given gmbus port number, the
driver must first check its validity using i2c_intel_gmbus_is_port_valid().
If this check fails, a call to intel_gmbus_get_adapter() will WARN_ON and
return NULL.  This is relevant for parts of the driver that read a port
from VBIOS, which might be improperly initialized and contain an invalid
port.  In these cases, the driver must fall back to using a safer default
port.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

Reading git-diff-tree failed