From: Arto Merilainen <amerilainen@nvidia.com>
Date: Wed, 29 May 2013 10:26:06 +0000 (+0300)
Subject: gpu: host1x: Fix memory access in syncpt request
X-Git-Tag: next-20130617~61^2~2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=61343ef3be6bcc5484307f5dbbf03fd005b2b475;p=karo-tx-linux.git

gpu: host1x: Fix memory access in syncpt request

This patch fixes a bad memory access in syncpoint request code. If
no syncpoints were available, the code accessed unreserved memory
area causing unexpected behaviour.

Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Acked-By: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---

diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c
index 4b493453e805..2b03f1b5cc5a 100644
--- a/drivers/gpu/host1x/syncpt.c
+++ b/drivers/gpu/host1x/syncpt.c
@@ -40,7 +40,8 @@ static struct host1x_syncpt *_host1x_syncpt_alloc(struct host1x *host,
 
 	for (i = 0; i < host->info->nb_pts && sp->name; i++, sp++)
 		;
-	if (sp->dev)
+
+	if (i >= host->info->nb_pts)
 		return NULL;
 
 	name = kasprintf(GFP_KERNEL, "%02d-%s", sp->id,