From 271393ba6e2ac384a14e581d34d5d72c5953e3c6 Mon Sep 17 00:00:00 2001
From: Mario Kleiner <mario.kleiner.de@gmail.com>
Date: Sat, 29 Apr 2017 06:11:30 +0200
Subject: [PATCH] drm/nouveau/fb/gf100-: Fix 32 bit wraparound in new ram
detection
A missing u64 cast causes a 32-Bit wraparound from
4096 MiB to 0 MiB and therefore total 0 MiB VRAM detected
if card has 4096 Mib per FBP.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Reviewed-by: Karol Herbst <karolherbst@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf100.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf100.c
index 53c32fc694e9..c63975907c90 100644
--- a/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf100.c
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/fb/ramgf100.c
@@ -589,7 +589,7 @@ gf100_ram_ctor(const struct nvkm_ram_func *func, struct nvkm_fb *fb,
nvkm_debug(subdev, "FBP %d: %4d MiB, %d LTC(s)\n",
fbp, size, ltcs);
lcomm = min(lcomm, (u64)(size / ltcs) << 20);
- total += size << 20;
+ total += (u64) size << 20;
ltcn += ltcs;
} else {
nvkm_debug(subdev, "FBP %d: disabled\n", fbp);
--
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