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[media] coda: move meta out of padding 

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.zabel@pengutronix.de>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Philipp Zabel 2015-01-23 13:51:18 -03:00 committed by Mauro Carvalho Chehab
parent e1519e866b
commit 07ba277f89
1 changed files with 5 additions and 4 deletions
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9
drivers/media/platform/coda/coda-bit.c
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@ -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];