diff mbox series

[4.19,33/84] drm/ttm: fix incrementing the page pointer for huge pages

Message ID 20200116231717.636874499@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Jan. 16, 2020, 11:18 p.m. UTC 
From: Christian König <christian.koenig@amd.com>

commit 453393369dc9806d2455151e329c599684762428 upstream.

When we increment the counter we need to increment the pointer as well.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: e16858a7e6e7 drm/ttm: fix start page for huge page check in ttm_put_pages()
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Acked-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Zubin Mithra <zsm@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/ttm/ttm_page_alloc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -733,7 +733,7 @@  static void ttm_put_pages(struct page **
 			if (!(flags & TTM_PAGE_FLAG_DMA32) &&
 			    (npages - i) >= HPAGE_PMD_NR) {
 				for (j = 1; j < HPAGE_PMD_NR; ++j)
-					if (p++ != pages[i + j])
+					if (++p != pages[i + j])
 					    break;
 
 				if (j == HPAGE_PMD_NR)
@@ -768,7 +768,7 @@  static void ttm_put_pages(struct page **
 				break;
 
 			for (j = 1; j < HPAGE_PMD_NR; ++j)
-				if (p++ != pages[i + j])
+				if (++p != pages[i + j])
 				    break;
 
 			if (j != HPAGE_PMD_NR)