media: coda: consolidate job_finish calls on decoder prepare_run failure

If the decoder prepare_run callback returns an error, the hardware
is never started and v4l2_m2m_job_finish() is called immediately,
currently in every error path.

Remove the duplicated job_finish calls from the error paths and reuse
the v4l2_m2m_job_finish() at the end of coda_pic_run_work instead.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/chips-media/coda-bit.c

@@ -2176,7 +2176,6 @@ static int coda_prepare_decode(struct coda_ctx *ctx)
 	    (!(ctx->bit_stream_param & CODA_BIT_STREAM_END_FLAG))) {
 		coda_dbg(1, ctx, "bitstream payload: %d, skipping\n",
 			 coda_get_bitstream_payload(ctx));
-		v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
 		return -EAGAIN;
 	}
 
@@ -2186,7 +2185,6 @@ static int coda_prepare_decode(struct coda_ctx *ctx)
 
 		if (ret < 0) {
 			v4l2_err(&dev->v4l2_dev, "failed to start decoding\n");
-			v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
 			return -EAGAIN;
 		} else {
 			ctx->initialized = 1;

drivers/media/platform/chips-media/coda-common.c

@@ -1510,12 +1510,8 @@ static void coda_pic_run_work(struct work_struct *work)
 	mutex_lock(&dev->coda_mutex);
 
 	ret = ctx->ops->prepare_run(ctx);
-	if (ret < 0 && ctx->inst_type == CODA_INST_DECODER) {
-		mutex_unlock(&dev->coda_mutex);
-		mutex_unlock(&ctx->buffer_mutex);
-		/* job_finish scheduled by prepare_decode */
-		return;
-	}
+	if (ret < 0 && ctx->inst_type == CODA_INST_DECODER)
+		goto out;
 
 	if (!wait_for_completion_timeout(&ctx->completion,
 					 msecs_to_jiffies(1000))) {
@@ -1537,6 +1533,7 @@ static void coda_pic_run_work(struct work_struct *work)
 	    ctx->ops->seq_end_work)
 		queue_work(dev->workqueue, &ctx->seq_end_work);
 
+out:
 	mutex_unlock(&dev->coda_mutex);
 	mutex_unlock(&ctx->buffer_mutex);
 

drivers/media/platform/chips-media/coda-jpeg.c

@@ -1340,10 +1340,8 @@ static int coda9_jpeg_prepare_decode(struct coda_ctx *ctx)
 				      vb2_plane_size(&src_buf->vb2_buf, 0));
 
 	chroma_format = coda9_jpeg_chroma_format(q_data_dst->fourcc);
-	if (chroma_format < 0) {
-		v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
+	if (chroma_format < 0)
 		return chroma_format;
-	}
 
 	ret = coda_jpeg_decode_header(ctx, &src_buf->vb2_buf);
 	if (ret < 0) {
@@ -1355,7 +1353,6 @@ static int coda9_jpeg_prepare_decode(struct coda_ctx *ctx)
 		v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
 		v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
 
-		v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
 		return ret;
 	}
 
@@ -1396,7 +1393,6 @@ static int coda9_jpeg_prepare_decode(struct coda_ctx *ctx)
 		if (ret < 0) {
 			v4l2_err(&dev->v4l2_dev,
 				 "failed to set up Huffman tables: %d\n", ret);
-			v4l2_m2m_job_finish(ctx->dev->m2m_dev, ctx->fh.m2m_ctx);
 			return ret;
 		}
 	}