Hi,
This patch does not apply to the current media tree.
commit cf3167cf1e969b17671a4d3d956d22718a8ceb85)
Author: Antti Palosaari <crope@xxxxxx>
Date: Fri Sep 26 22:45:36 2014 -0300
[media] pt3: fix DTV FE I2C driver load error paths
Best wishes,
--
Kamil Debski
Samsung R&D Institute Poland
> -----Original Message-----
> From: Kiran AVND [mailto:avnd.kiran@xxxxxxxxxxx]
> Sent: Friday, September 26, 2014 6:52 AM
> To: linux-media@xxxxxxxxxxxxxxx
> Cc: k.debski@xxxxxxxxxxx; wuchengli@xxxxxxxxxxxx; posciak@xxxxxxxxxxxx;
> arun.m@xxxxxxxxxxx; ihf@xxxxxxxxxxxx; prathyush.k@xxxxxxxxxxx;
> arun.kk@xxxxxxxxxxx; kiran@xxxxxxxxxxxx
> Subject: [PATCH v2 13/14] [media] s5p-mfc: fix a race in interrupt
> flags handling
>
> From: Pawel Osciak <posciak@xxxxxxxxxxxx>
>
> Interrupt result flags have to be cleared before a hardware job is run.
> Otherwise, if they are cleared asynchronously, we may end up clearing
> them after the interrupt for which we wanted to wait has already
> arrived, thus overwriting the job results that we intended to wait for.
>
> To prevent this, clear the flags only under hw_lock and before running
> a hardware job.
>
> Signed-off-by: Pawel Osciak <posciak@xxxxxxxxxxxx>
> Signed-off-by: Kiran AVND <avnd.kiran@xxxxxxxxxxx>
> ---
> drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c | 2 --
> drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 3 ---
> drivers/media/platform/s5p-mfc/s5p_mfc_enc.c | 1 -
> drivers/media/platform/s5p-mfc/s5p_mfc_opr_v5.c | 13 ++-----------
> drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c | 12 ++----------
> 5 files changed, 4 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
> b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
> index 565a6ed..ca0a5cd 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_ctrl.c
> @@ -468,7 +468,6 @@ int s5p_mfc_open_mfc_inst(struct s5p_mfc_dev *dev,
> struct s5p_mfc_ctx *ctx)
> }
>
> set_work_bit_irqsave(ctx);
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
> if (s5p_mfc_wait_for_done_ctx(ctx,
> S5P_MFC_R2H_CMD_OPEN_INSTANCE_RET, 0)) { @@ -494,7 +493,6
> @@ void s5p_mfc_close_mfc_inst(struct s5p_mfc_dev *dev, struct
> s5p_mfc_ctx *ctx) {
> ctx->state = MFCINST_RETURN_INST;
> set_work_bit_irqsave(ctx);
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
> /* Wait until instance is returned or timeout occurred */
> if (s5p_mfc_wait_for_done_ctx(ctx,
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> index 301d74f..7eef03a 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> @@ -350,7 +350,6 @@ static int vidioc_g_fmt(struct file *file, void
> *priv, struct v4l2_format *f)
> MFCINST_RES_CHANGE_END)) {
> /* If the MFC is parsing the header,
> * so wait until it is finished */
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_wait_for_done_ctx(ctx,
> S5P_MFC_R2H_CMD_SEQ_DONE_RET,
> 0);
> }
> @@ -762,7 +761,6 @@ static int s5p_mfc_dec_g_v_ctrl(struct v4l2_ctrl
> *ctrl)
> return -EINVAL;
> }
> /* Should wait for the header to be parsed */
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_wait_for_done_ctx(ctx,
> S5P_MFC_R2H_CMD_SEQ_DONE_RET, 0);
> if (ctx->state >= MFCINST_HEAD_PARSED && @@ -1076,7 +1074,6
> @@ static void s5p_mfc_stop_streaming(struct vb2_queue *q)
> if (IS_MFCV6_PLUS(dev) && (ctx->state == MFCINST_RUNNING))
> {
> ctx->state = MFCINST_FLUSH;
> set_work_bit_irqsave(ctx);
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_hw_call(dev->mfc_ops, try_run, dev);
> if (s5p_mfc_wait_for_done_ctx(ctx,
> S5P_MFC_R2H_CMD_DPB_FLUSH_RET, 0))
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> index 653f28f..407dc63 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c
> @@ -1679,7 +1679,6 @@ static int s5p_mfc_enc_g_v_ctrl(struct v4l2_ctrl
> *ctrl)
> return -EINVAL;
> }
> /* Should wait for the header to be produced */
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_wait_for_done_ctx(ctx,
> S5P_MFC_R2H_CMD_SEQ_DONE_RET, 0);
> if (ctx->state >= MFCINST_HEAD_PARSED && diff --git
> a/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v5.c
> b/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v5.c
> index f882905..40a98ad 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v5.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v5.c
> @@ -1178,7 +1178,6 @@ static void s5p_mfc_run_res_change(struct
> s5p_mfc_ctx *ctx)
>
> s5p_mfc_set_dec_stream_buffer_v5(ctx, 0, 0, 0);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_decode_one_frame_v5(ctx, MFC_DEC_RES_CHANGE); }
>
> @@ -1192,7 +1191,6 @@ static int s5p_mfc_run_dec_frame(struct
> s5p_mfc_ctx *ctx, int last_frame)
> last_frame = MFC_DEC_LAST_FRAME;
> s5p_mfc_set_dec_stream_buffer_v5(ctx, 0, 0, 0);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_decode_one_frame_v5(ctx, last_frame);
> return 0;
> }
> @@ -1212,7 +1210,6 @@ static int s5p_mfc_run_dec_frame(struct
> s5p_mfc_ctx *ctx, int last_frame)
> ctx->consumed_stream, temp_vb->b-
> >v4l2_planes[0].bytesused);
> spin_unlock_irqrestore(&dev->irqlock, flags);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> if (temp_vb->b->v4l2_planes[0].bytesused == 0) {
> last_frame = MFC_DEC_LAST_FRAME;
> mfc_debug(2, "Setting ctx->state to FINISHING\n"); @@ -
> 1273,7 +1270,6 @@ static int s5p_mfc_run_enc_frame(struct s5p_mfc_ctx
> *ctx)
> s5p_mfc_set_enc_stream_buffer_v5(ctx, dst_addr, dst_size);
> spin_unlock_irqrestore(&dev->irqlock, flags);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> mfc_debug(2, "encoding buffer with index=%d state=%d\n",
> src_mb ? src_mb->b->v4l2_buf.index : -1, ctx->state);
> s5p_mfc_encode_one_frame_v5(ctx);
> @@ -1297,7 +1293,6 @@ static void s5p_mfc_run_init_dec(struct
> s5p_mfc_ctx *ctx)
> 0, temp_vb->b->v4l2_planes[0].bytesused);
> spin_unlock_irqrestore(&dev->irqlock, flags);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_init_decode_v5(ctx);
> }
>
> @@ -1317,7 +1312,6 @@ static void s5p_mfc_run_init_enc(struct
> s5p_mfc_ctx *ctx)
> s5p_mfc_set_enc_stream_buffer_v5(ctx, dst_addr, dst_size);
> spin_unlock_irqrestore(&dev->irqlock, flags);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_init_encode_v5(ctx);
> }
>
> @@ -1352,7 +1346,6 @@ static int s5p_mfc_run_init_dec_buffers(struct
> s5p_mfc_ctx *ctx)
> 0, temp_vb->b->v4l2_planes[0].bytesused);
> spin_unlock_irqrestore(&dev->irqlock, flags);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_set_dec_frame_buffer_v5(ctx);
> if (ret) {
> mfc_err("Failed to alloc frame mem\n"); @@ -1396,6 +1389,8
> @@ static void s5p_mfc_try_run_v5(struct s5p_mfc_dev *dev)
> * Now obtaining frames from MFC buffer
> */
> s5p_mfc_clock_on();
> + s5p_mfc_clean_ctx_int_flags(ctx);
> +
> if (ctx->type == MFCINST_DECODER) {
> s5p_mfc_set_dec_desc_buffer(ctx);
> switch (ctx->state) {
> @@ -1406,12 +1401,10 @@ static void s5p_mfc_try_run_v5(struct
> s5p_mfc_dev *dev)
> ret = s5p_mfc_run_dec_frame(ctx, MFC_DEC_FRAME);
> break;
> case MFCINST_INIT:
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_hw_call(dev->mfc_cmds, open_inst_cmd,
> ctx);
> break;
> case MFCINST_RETURN_INST:
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_hw_call(dev->mfc_cmds, close_inst_cmd,
> ctx);
> break;
> @@ -1444,12 +1437,10 @@ static void s5p_mfc_try_run_v5(struct
> s5p_mfc_dev *dev)
> ret = s5p_mfc_run_enc_frame(ctx);
> break;
> case MFCINST_INIT:
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_hw_call(dev->mfc_cmds, open_inst_cmd,
> ctx);
> break;
> case MFCINST_RETURN_INST:
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_hw_call(dev->mfc_cmds, close_inst_cmd,
> ctx);
> break;
> 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 991008a..9104a75 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c
> @@ -1399,7 +1399,6 @@ static inline void s5p_mfc_set_flush(struct
> s5p_mfc_ctx *ctx, int flush)
>
> if (flush) {
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> WRITEL(ctx->inst_no, mfc_regs->instance_id);
> s5p_mfc_hw_call(dev->mfc_cmds, cmd_host2risc, dev,
> S5P_FIMV_H2R_CMD_FLUSH_V6, NULL);
> @@ -1540,7 +1539,6 @@ static inline void
> s5p_mfc_run_dec_last_frames(struct s5p_mfc_ctx *ctx)
>
> s5p_mfc_set_dec_stream_buffer_v6(ctx, 0, 0, 0);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_decode_one_frame_v6(ctx, MFC_DEC_LAST_FRAME); }
>
> @@ -1577,7 +1575,6 @@ static inline int s5p_mfc_run_dec_frame(struct
> s5p_mfc_ctx *ctx)
> spin_unlock_irqrestore(&dev->irqlock, flags);
>
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> if (temp_vb->b->v4l2_planes[0].bytesused == 0) {
> last_frame = 1;
> mfc_debug(2, "Setting ctx->state to FINISHING\n"); @@ -
> 1634,7 +1631,6 @@ static inline int s5p_mfc_run_enc_frame(struct
> s5p_mfc_ctx *ctx)
> spin_unlock_irqrestore(&dev->irqlock, flags);
>
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_encode_one_frame_v6(ctx);
>
> return 0;
> @@ -1656,7 +1652,6 @@ static inline void s5p_mfc_run_init_dec(struct
> s5p_mfc_ctx *ctx)
> temp_vb->b->v4l2_planes[0].bytesused);
> spin_unlock_irqrestore(&dev->irqlock, flags);
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> s5p_mfc_init_decode_v6(ctx);
> }
>
> @@ -1676,7 +1671,6 @@ static inline void s5p_mfc_run_init_enc(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_clean_ctx_int_flags(ctx);
> s5p_mfc_init_encode_v6(ctx);
> }
>
> @@ -1696,7 +1690,6 @@ static inline int
> s5p_mfc_run_init_dec_buffers(struct s5p_mfc_ctx *ctx)
> }
>
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_set_dec_frame_buffer_v6(ctx);
> if (ret) {
> mfc_err("Failed to alloc frame mem.\n"); @@ -1711,7 +1704,6
> @@ static inline int s5p_mfc_run_init_enc_buffers(struct s5p_mfc_ctx
> *ctx)
> int ret;
>
> dev->curr_ctx = ctx->num;
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_set_enc_ref_buffer_v6(ctx);
> if (ret) {
> mfc_err("Failed to alloc frame mem.\n"); @@ -1760,6 +1752,8
> @@ static void s5p_mfc_try_run_v6(struct s5p_mfc_dev *dev)
> * Now obtaining frames from MFC buffer */
>
> s5p_mfc_clock_on();
> + s5p_mfc_clean_ctx_int_flags(ctx);
> +
> if (ctx->type == MFCINST_DECODER) {
> switch (ctx->state) {
> case MFCINST_FINISHING:
> @@ -1769,12 +1763,10 @@ static void s5p_mfc_try_run_v6(struct
> s5p_mfc_dev *dev)
> ret = s5p_mfc_run_dec_frame(ctx);
> break;
> case MFCINST_INIT:
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_hw_call(dev->mfc_cmds, open_inst_cmd,
> ctx);
> break;
> case MFCINST_RETURN_INST:
> - s5p_mfc_clean_ctx_int_flags(ctx);
> ret = s5p_mfc_hw_call(dev->mfc_cmds, close_inst_cmd,
> ctx);
> break;
> --
> 1.7.9.5
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