[PATCH v2] media: verisilicon: Fix crash when probing encoder

Benjamin Gaignard
2023-04-13T10:49:23Z

ctx->vpu_dst_fmt is no more initialized before calling hantro_try_fmt()
so assigne it to vpu_fmt led to crash the kernel.
Like for decoder case use 'fmt' as format for encoder and clean up
the code.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixes: db6f68b51e5c ("media: verisilicon: Do not set context src/dst formats in reset functions")
---
version 2:
- Remove useless vpu_fmt.

drivers/media/platform/verisilicon/hantro_v4l2.c | 10 +++-------
1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c b/drivers/media/platform/verisilicon/hantro_v4l2.c
index 8f1414085f47..d71f79471396 100644
--- a/drivers/media/platform/verisilicon/hantro_v4l2.c
+++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
@@ -275,7 +275,7 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,
struct v4l2_pix_format_mplane *pix_mp,
enum v4l2_buf_type type)
{
- const struct hantro_fmt *fmt, *vpu_fmt;
+ const struct hantro_fmt *fmt;
bool capture = V4L2_TYPE_IS_CAPTURE(type);
bool coded;

@@ -295,11 +295,7 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,

if (coded) {
pix_mp->num_planes = 1;
- vpu_fmt = fmt;
- } else if (ctx->is_encoder) {
- vpu_fmt = ctx->vpu_dst_fmt;
- } else {
- vpu_fmt = fmt;
+ } else if (!ctx->is_encoder) {
/*
* Width/height on the CAPTURE end of a decoder are ignored and
* replaced by the OUTPUT ones.
@@ -311,7 +307,7 @@ static int hantro_try_fmt(const struct hantro_ctx *ctx,
pix_mp->field = V4L2_FIELD_NONE;

v4l2_apply_frmsize_constraints(&pix_mp->width, &pix_mp->height,
- &vpu_fmt->frmsize);
+ &fmt->frmsize);

if (!coded) {
/* Fill remaining fields */
--
2.34.1