From: Krzysztof Kolasa <kkolasa@winsoft.pl>
Date: Sun, 15 Mar 2015 19:22:36 +0000 (+0100)
Subject: [PATCH] drm/mm: Fix support 4 GiB and larger ranges
X-Git-Tag: firefly_0821_release~176^2~2152^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=046d669c62f37323ef0329c41d83a03c06b2087d;p=firefly-linux-kernel-4.4.55.git

[PATCH] drm/mm: Fix support 4 GiB and larger ranges

bad argument if(tmp)... in check_free_hole

fix oops: kernel BUG at drivers/gpu/drm/drm_mm.c:305!

[airlied: excellent, this was my task for today].

Signed-off-by: Krzysztof Kolasa <kkolasa@winsoft.pl>
Reviewed-by: Chris wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c
index 7fc6f8bd4821..1134526286c8 100644
--- a/drivers/gpu/drm/drm_mm.c
+++ b/drivers/gpu/drm/drm_mm.c
@@ -403,7 +403,7 @@ static int check_free_hole(u64 start, u64 end, u64 size, unsigned alignment)
 		unsigned rem;
 
 		rem = do_div(tmp, alignment);
-		if (tmp)
+		if (rem)
 			start += alignment - rem;
 	}