[media] s5p-mfc: use spinlock to protect MFC context

MFC driver uses dev->irqlock spinlock to protect queues only, but many context
fields require protection also - they can be accessed concurrently
from IOCTLs and IRQ handler. The patch increases protection range of irqlock
to those fields also.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Kamil Debski <k.debski@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 0 insertions, 18 deletions

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c b/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c
index 764a675ec53d..2a9ca428648f 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c
@@ -1520,7 +1520,6 @@ static inline int s5p_mfc_run_dec_frame(struct s5p_mfc_ctx *ctx)
 {
 	struct s5p_mfc_dev *dev = ctx->dev;
 	struct s5p_mfc_buf *temp_vb;
-	unsigned long flags;
 	int last_frame = 0;
 
 	if (ctx->state == MFCINST_FINISHING) {
@@ -1532,11 +1531,9 @@ static inline int s5p_mfc_run_dec_frame(struct s5p_mfc_ctx *ctx)
 		return 0;
 	}
 
-	spin_lock_irqsave(&dev->irqlock, flags);
 	/* Frames are being decoded */
 	if (list_empty(&ctx->src_queue)) {
 		mfc_debug(2, "No src buffers.\n");
-		spin_unlock_irqrestore(&dev->irqlock, flags);
 		return -EAGAIN;
 	}
 	/* Get the next source buffer */
@@ -1546,7 +1543,6 @@ static inline int s5p_mfc_run_dec_frame(struct s5p_mfc_ctx *ctx)
 		vb2_dma_contig_plane_dma_addr(&temp_vb->b->vb2_buf, 0),
 			ctx->consumed_stream,
 			temp_vb->b->vb2_buf.planes[0].bytesused);
-	spin_unlock_irqrestore(&dev->irqlock, flags);
 
 	dev->curr_ctx = ctx->num;
 	if (temp_vb->b->vb2_buf.planes[0].bytesused == 0) {
@@ -1562,7 +1558,6 @@ static inline int s5p_mfc_run_dec_frame(struct s5p_mfc_ctx *ctx)
 static inline int s5p_mfc_run_enc_frame(struct s5p_mfc_ctx *ctx)
 {
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned long flags;
 	struct s5p_mfc_buf *dst_mb;
 	struct s5p_mfc_buf *src_mb;
 	unsigned long src_y_addr, src_c_addr, dst_addr;
@@ -1571,17 +1566,13 @@ static inline int s5p_mfc_run_enc_frame(struct s5p_mfc_ctx *ctx)
 	*/
 	unsigned int dst_size;
 
-	spin_lock_irqsave(&dev->irqlock, flags);
-
 	if (list_empty(&ctx->src_queue) && ctx->state != MFCINST_FINISHING) {
 		mfc_debug(2, "no src buffers.\n");
-		spin_unlock_irqrestore(&dev->irqlock, flags);
 		return -EAGAIN;
 	}
 
 	if (list_empty(&ctx->dst_queue)) {
 		mfc_debug(2, "no dst buffers.\n");
-		spin_unlock_irqrestore(&dev->irqlock, flags);
 		return -EAGAIN;
 	}
 
@@ -1615,8 +1606,6 @@ static inline int s5p_mfc_run_enc_frame(struct s5p_mfc_ctx *ctx)
 
 	s5p_mfc_set_enc_stream_buffer_v6(ctx, dst_addr, dst_size);
 
-	spin_unlock_irqrestore(&dev->irqlock, flags);
-
 	dev->curr_ctx = ctx->num;
 	s5p_mfc_encode_one_frame_v6(ctx);
 
@@ -1626,18 +1615,15 @@ static inline int s5p_mfc_run_enc_frame(struct s5p_mfc_ctx *ctx)
 static inline void s5p_mfc_run_init_dec(struct s5p_mfc_ctx *ctx)
 {
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned long flags;
 	struct s5p_mfc_buf *temp_vb;
 
 	/* Initializing decoding - parsing header */
-	spin_lock_irqsave(&dev->irqlock, flags);
 	mfc_debug(2, "Preparing to init decoding.\n");
 	temp_vb = list_entry(ctx->src_queue.next, struct s5p_mfc_buf, list);
 	mfc_debug(2, "Header size: %d\n", temp_vb->b->vb2_buf.planes[0].bytesused);
 	s5p_mfc_set_dec_stream_buffer_v6(ctx,
 		vb2_dma_contig_plane_dma_addr(&temp_vb->b->vb2_buf, 0), 0,
 			temp_vb->b->vb2_buf.planes[0].bytesused);
-	spin_unlock_irqrestore(&dev->irqlock, flags);
 	dev->curr_ctx = ctx->num;
 	s5p_mfc_init_decode_v6(ctx);
 }
@@ -1645,18 +1631,14 @@ static inline void s5p_mfc_run_init_dec(struct s5p_mfc_ctx *ctx)
 static inline void s5p_mfc_run_init_enc(struct s5p_mfc_ctx *ctx)
 {
 	struct s5p_mfc_dev *dev = ctx->dev;
-	unsigned long flags;
 	struct s5p_mfc_buf *dst_mb;
 	unsigned long dst_addr;
 	unsigned int dst_size;
 
-	spin_lock_irqsave(&dev->irqlock, flags);
-
 	dst_mb = list_entry(ctx->dst_queue.next, struct s5p_mfc_buf, list);
 	dst_addr = vb2_dma_contig_plane_dma_addr(&dst_mb->b->vb2_buf, 0);
 	dst_size = vb2_plane_size(&dst_mb->b->vb2_buf, 0);
 	s5p_mfc_set_enc_stream_buffer_v6(ctx, dst_addr, dst_size);
-	spin_unlock_irqrestore(&dev->irqlock, flags);
 	dev->curr_ctx = ctx->num;
 	s5p_mfc_init_encode_v6(ctx);
 }