Handle an empty buffer metadata list without crashing. This can happen
if the decoder is fed a broken stream, or multiple compressed frames in
a single queued buffer.
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
drivers/media/platform/coda/coda-bit.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/media/platform/coda/coda-bit.c
b/drivers/media/platform/coda/coda-bit.c
index b4029ae..f6cf337 100644
--- a/drivers/media/platform/coda/coda-bit.c
+++ b/drivers/media/platform/coda/coda-bit.c
@@ -1565,6 +1565,7 @@ static int coda_prepare_decode(struct coda_ctx *ctx)
struct vb2_buffer *dst_buf;
struct coda_dev *dev = ctx->dev;
struct coda_q_data *q_data_dst;
+ struct coda_buffer_meta *meta;
u32 reg_addr, reg_stride;
dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
@@ -1643,12 +1644,12 @@ static int coda_prepare_decode(struct coda_ctx *ctx)
coda_write(dev, ctx->iram_info.axi_sram_use,
CODA7_REG_BIT_AXI_SRAM_USE);
- if (ctx->codec->src_fourcc == V4L2_PIX_FMT_JPEG) {
- struct coda_buffer_meta *meta;
+ meta = list_first_entry_or_null(&ctx->buffer_meta_list,
+ struct coda_buffer_meta, list);
+
+ if (meta && ctx->codec->src_fourcc == V4L2_PIX_FMT_JPEG) {
/* If this is the last buffer in the bitstream, add padding */
- meta = list_first_entry(&ctx->buffer_meta_list,
- struct coda_buffer_meta, list);
if (meta->end == (ctx->bitstream_fifo.kfifo.in &
ctx->bitstream_fifo.kfifo.mask)) {
static unsigned char buf[512];
--
2.1.4
--
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