[PATCH 6.18 585/752] media: verisilicon: AV1: Fix tile info buffer size

Sasha Levin
2026-02-28T17:56:37Z

From: Benjamin Gaignard <benjamin.gaignard@collabora.com>

[ Upstream commit a505ca2db89ad92a8d8d27fa68ebafb12e04a679 ]

Each tile info is composed of: row_sb, col_sb, start_pos
and end_pos (4 bytes each). So the total required memory
is AV1_MAX_TILES * 16 bytes.
Use the correct #define to allocate the buffer and avoid
writing tile info in non-allocated memory.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Fixes: 727a400686a2c ("media: verisilicon: Add Rockchip AV1 decoder")
Cc: stable@vger.kernel.org
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c b/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c
index 500e94bcb0293..e4e21ad373233 100644
--- a/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c
+++ b/drivers/media/platform/verisilicon/rockchip_vpu981_hw_av1_dec.c
@@ -381,12 +381,12 @@ int rockchip_vpu981_av1_dec_init(struct hantro_ctx *ctx)
return -ENOMEM;
av1_dec->global_model.size = GLOBAL_MODEL_SIZE;

- av1_dec->tile_info.cpu = dma_alloc_coherent(vpu->dev, AV1_MAX_TILES,
+ av1_dec->tile_info.cpu = dma_alloc_coherent(vpu->dev, AV1_TILE_INFO_SIZE,
&av1_dec->tile_info.dma,
GFP_KERNEL);
if (!av1_dec->tile_info.cpu)
return -ENOMEM;
- av1_dec->tile_info.size = AV1_MAX_TILES;
+ av1_dec->tile_info.size = AV1_TILE_INFO_SIZE;

av1_dec->film_grain.cpu = dma_alloc_coherent(vpu->dev,
ALIGN(sizeof(struct rockchip_av1_film_grain), 2048),
--
2.51.0