From patchwork Tue Oct 21 11:07:07 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Arun Kumar K X-Patchwork-Id: 5114371 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0B5EC9F374 for ; Tue, 21 Oct 2014 11:08:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C54592012F for ; Tue, 21 Oct 2014 11:08:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D3F320136 for ; Tue, 21 Oct 2014 11:08:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932369AbaJULIW (ORCPT ); Tue, 21 Oct 2014 07:08:22 -0400 Received: from mail-pd0-f172.google.com ([209.85.192.172]:56573 "EHLO mail-pd0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932347AbaJULIT (ORCPT ); Tue, 21 Oct 2014 07:08:19 -0400 Received: by mail-pd0-f172.google.com with SMTP id ft15so1155195pdb.3 for ; Tue, 21 Oct 2014 04:08:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=MCPp6LrJDTigf5usOqwo4g8r7OL54qRMrbCVvOfXgME=; b=iftfHGPMYBIUkQYANqJ94MeVZgwOoOdT2oN7AvMbrzrxkSBwKBNp8z5lwcKnGHmPMW AUwGioFauKsF+X6wp+PYI/4ZugvUkBj8Sv0rz/XZw/kRxbuPSxi7FmF9gvWc5HpDIMZW nGBa7Oa5NchHaOAQo0HxKIQ3mIn+eXrbrWwzs2H3FA5xNTHAipY4aCH64d5uTJXACCA0 e0swvgMEABeNzF7EbN3g4HXVNOrihXkAymndFC2Tubvt8UwEE56qsno2wKMaDnw170Wv Z1Ilx1UnpjffxZ/qjvZ9/w5Vml/ia0mD/RS0KWygNWnaAyjCMAnMBfVdJAo10VmpAbfi RO/A== X-Received: by 10.66.97.39 with SMTP id dx7mr34350064pab.65.1413889698937; Tue, 21 Oct 2014 04:08:18 -0700 (PDT) Received: from localhost.localdomain ([14.140.216.146]) by mx.google.com with ESMTPSA id s9sm11680849pdp.1.2014.10.21.04.08.14 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 21 Oct 2014 04:08:18 -0700 (PDT) From: Arun Kumar K To: linux-media@vger.kernel.org, linux-samsung-soc@vger.kernel.org Cc: k.debski@samsung.com, wuchengli@chromium.org, posciak@chromium.org, arun.m@samsung.com, ihf@chromium.org, prathyush.k@samsung.com, kiran@chromium.org, arunkk.samsung@gmail.com Subject: [PATCH v3 13/13] [media] s5p-mfc: fix a race in interrupt flags handling Date: Tue, 21 Oct 2014 16:37:07 +0530 Message-Id: <1413889627-8431-14-git-send-email-arun.kk@samsung.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1413889627-8431-1-git-send-email-arun.kk@samsung.com> References: <1413889627-8431-1-git-send-email-arun.kk@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-8.2 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Pawel Osciak 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 Signed-off-by: Kiran AVND Signed-off-by: Arun Kumar K --- 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 7c3eaa5..86d43d9 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_void(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_void(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 de90465..74bcec8 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c @@ -334,7 +334,6 @@ 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); } @@ -746,7 +745,6 @@ 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 && @@ -1058,7 +1056,6 @@ 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_void(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 6a1c890..7f919e4 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_enc.c @@ -1663,7 +1663,6 @@ 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 7cf0796..0c4fcf2 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 7b1cf73..9aea179 100644 --- a/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_opr_v6.c @@ -1394,7 +1394,6 @@ 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_void(dev->mfc_cmds, cmd_host2risc, dev, S5P_FIMV_H2R_CMD_FLUSH_V6, NULL); @@ -1535,7 +1534,6 @@ 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); } @@ -1572,7 +1570,6 @@ 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"); @@ -1629,7 +1626,6 @@ 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; @@ -1651,7 +1647,6 @@ 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); } @@ -1671,7 +1666,6 @@ 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); } @@ -1691,7 +1685,6 @@ 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"); @@ -1706,7 +1699,6 @@ 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"); @@ -1755,6 +1747,8 @@ 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: @@ -1764,12 +1758,10 @@ 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;