From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Fri, 20 Nov 2015 19:43:50 +0000 (-0800)
Subject: drm/ttm: Fixed a read/write lock imbalance
X-Git-Tag: v3.2.75~41
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad404016553666c23829234b69db4253de46983b;p=pandora-kernel.git

drm/ttm: Fixed a read/write lock imbalance

commit 025af189fb44250206dd8a32fa4a682392af3301 upstream.

In ttm_write_lock(), the uninterruptible path should call
__ttm_write_lock() not __ttm_read_lock().  This fixes a vmwgfx hang
on F23 start up.

syeh: Extracted this from one of Thomas' internal patches.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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