[PATCHv3] drm/xe/display: use mul_u32_u32 for multiplying operands

[Arun R Murthy]

Use mul_u32_u32 to avoid potential overflow in multiplying two u32 and
store the u64 result.

v2: remove u64 typecast and use mul_u32_u32 (Ville)
v3: Reframe the commit message <Rodrigo>

Signed-off-by: Arun R Murthy <arun.r.murthy at intel.com>
---
 drivers/gpu/drm/xe/display/xe_fb_pin.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/xe/display/xe_fb_pin.c b/drivers/gpu/drm/xe/display/xe_fb_pin.c
index 3a584bc3a0a3..c73054c09ae9 100644
--- a/drivers/gpu/drm/xe/display/xe_fb_pin.c
+++ b/drivers/gpu/drm/xe/display/xe_fb_pin.c
@@ -29,7 +29,7 @@ write_dpt_rotated(struct xe_bo *bo, struct iosys_map *map, u32 *dpt_ofs, u32 bo_
 		u32 src_idx = src_stride * (height - 1) + column + bo_ofs;
 
 		for (row = 0; row < height; row++) {
-			u64 pte = ggtt->pt_ops->pte_encode_bo(bo, src_idx * XE_PAGE_SIZE,
+			u64 pte = ggtt->pt_ops->pte_encode_bo(bo, mul_u32_u32(src_idx, XE_PAGE_SIZE),
 							      xe->pat.idx[XE_CACHE_NONE]);
 
 			iosys_map_wr(map, *dpt_ofs, u64, pte);
@@ -61,8 +61,8 @@ write_dpt_remapped(struct xe_bo *bo, struct iosys_map *map, u32 *dpt_ofs,
 
 		for (column = 0; column < width; column++) {
 			iosys_map_wr(map, *dpt_ofs, u64,
-				     pte_encode_bo(bo, src_idx * XE_PAGE_SIZE,
-				     xe->pat.idx[XE_CACHE_NONE]));
+				     pte_encode_bo(bo, mul_u32_u32(src_idx, XE_PAGE_SIZE),
+						   xe->pat.idx[XE_CACHE_NONE]));
 
 			*dpt_ofs += 8;
 			src_idx++;
@@ -121,7 +121,7 @@ static int __xe_pin_fb_vma_dpt(struct intel_framebuffer *fb,
 		u32 x;
 
 		for (x = 0; x < size / XE_PAGE_SIZE; x++) {
-			u64 pte = ggtt->pt_ops->pte_encode_bo(bo, x * XE_PAGE_SIZE,
+			u64 pte = ggtt->pt_ops->pte_encode_bo(bo, mul_u32_u32(x, XE_PAGE_SIZE),
 							      xe->pat.idx[XE_CACHE_NONE]);
 
 			iosys_map_wr(&dpt->vmap, x * 8, u64, pte);
@@ -167,7 +167,7 @@ write_ggtt_rotated(struct xe_bo *bo, struct xe_ggtt *ggtt, u32 *ggtt_ofs, u32 bo
 		u32 src_idx = src_stride * (height - 1) + column + bo_ofs;
 
 		for (row = 0; row < height; row++) {
-			u64 pte = ggtt->pt_ops->pte_encode_bo(bo, src_idx * XE_PAGE_SIZE,
+			u64 pte = ggtt->pt_ops->pte_encode_bo(bo, mul_u32_u32(src_idx, XE_PAGE_SIZE),
 							      xe->pat.idx[XE_CACHE_NONE]);
 
 			xe_ggtt_set_pte(ggtt, *ggtt_ofs, pte);
-- 
2.25.1