[PATCH 5.11 255/306] drm/nouveau: fix dma syncing for loops (v2)

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

From: Dave Airlie <airlied@redhat.com>

[ Upstream commit 4042160c2e5433e0759782c402292a90b5bf458d ]

The index variable should only be increased in one place.

Noticed this while trying to track down another oops.

v2: use while loop.

Fixes: f295c8cfec83 ("drm/nouveau: fix dma syncing warning with debugging on.")
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Michael J. Ruhl <redacted>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210311043527.5376-1-airlied@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/nouveau/nouveau_bo.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index 7ea367a5444d..f1c9a22083be 100644
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c

@@ -556,7 +556,8 @@ nouveau_bo_sync_for_device(struct nouveau_bo *nvbo)
 	if (nvbo->force_coherent)
 		return;
 
-	for (i = 0; i < ttm_dma->num_pages; ++i) {
+	i = 0;
+	while (i < ttm_dma->num_pages) {
 		struct page *p = ttm_dma->pages[i];
 		size_t num_pages = 1;
 

@@ -587,7 +588,8 @@ nouveau_bo_sync_for_cpu(struct nouveau_bo *nvbo)
 	if (nvbo->force_coherent)
 		return;
 
-	for (i = 0; i < ttm_dma->num_pages; ++i) {
+	i = 0;
+	while (i < ttm_dma->num_pages) {
 		struct page *p = ttm_dma->pages[i];
 		size_t num_pages = 1;
 

-- 
2.30.1