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[35.245.152.114]) by smtp.gmail.com with ESMTPSA id s26-20020ae9f71a000000b0078d3b54eb76sm6718055qkg.78.2024.04.15.12.34.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Apr 2024 12:34:40 -0700 (PDT) From: Ricardo Ribalda Date: Mon, 15 Apr 2024 19:34:29 +0000 Subject: [PATCH 12/35] media: platform: mtk-mdp3: Use refcount_t for job_count Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240415-fix-cocci-v1-12-477afb23728b@chromium.org> References: <20240415-fix-cocci-v1-0-477afb23728b@chromium.org> In-Reply-To: <20240415-fix-cocci-v1-0-477afb23728b@chromium.org> To: Martin Tuma , Mauro Carvalho Chehab , Laurent Pinchart , Hans Verkuil , Hugues Fruchet , Alain Volmat , Maxime Coquelin , Alexandre Torgue , Paul Kocialkowski , Greg Kroah-Hartman , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Sakari Ailus , Thierry Reding , Jonathan Hunter , Sowjanya Komatineni , Luca Ceresoli , Matthias Brugger , AngeloGioacchino Del Regno , Hans Verkuil , Sergey Kozlov , Abylay Ospan , Ezequiel Garcia , Dmitry Osipenko , Stanimir Varbanov , Vikash Garodia , Bryan O'Donoghue , Bjorn Andersson , Konrad Dybcio , Benjamin Mugnier , Sylvain Petinot , Jacopo Mondi , Kieran Bingham , Laurent Pinchart , =?utf-8?q?Ni?= =?utf-8?q?klas_S=C3=B6derlund?= , Pavel Machek Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-staging@lists.linux.dev, linux-sunxi@lists.linux.dev, linux-tegra@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, Ricardo Ribalda X-Mailer: b4 0.12.4 Use an API that resembles more the actual use of job_count. Found by cocci: drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c:527:5-24: WARNING: atomic_dec_and_test variation before object free at line 541. drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c:578:6-25: WARNING: atomic_dec_and_test variation before object free at line 581. Signed-off-by: Ricardo Ribalda --- drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c | 10 +++++----- drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c | 6 +++--- drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h | 2 +- drivers/media/platform/mediatek/mdp3/mtk-mdp3-m2m.c | 6 +++--- 4 files changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c index 1d64bac34b90..ea2ea119dd2a 100644 --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-cmdq.c @@ -524,7 +524,7 @@ static void mdp_auto_release_work(struct work_struct *work) mdp_comp_clocks_off(&mdp->pdev->dev, cmd->comps, cmd->num_comps); - if (atomic_dec_and_test(&mdp->job_count)) { + if (refcount_dec_and_test(&mdp->job_count)) { if (cmd->mdp_ctx) mdp_m2m_job_finish(cmd->mdp_ctx); @@ -575,7 +575,7 @@ static void mdp_handle_cmdq_callback(struct mbox_client *cl, void *mssg) mdp_comp_clocks_off(&mdp->pdev->dev, cmd->comps, cmd->num_comps); - if (atomic_dec_and_test(&mdp->job_count)) + if (refcount_dec_and_test(&mdp->job_count)) wake_up(&mdp->callback_wq); mdp_cmdq_pkt_destroy(&cmd->pkt); @@ -724,9 +724,9 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param) int i, ret; u8 pp_used = __get_pp_num(param->param->type); - atomic_set(&mdp->job_count, pp_used); + refcount_set(&mdp->job_count, pp_used); if (atomic_read(&mdp->suspended)) { - atomic_set(&mdp->job_count, 0); + refcount_set(&mdp->job_count, 0); return -ECANCELED; } @@ -764,7 +764,7 @@ int mdp_cmdq_send(struct mdp_dev *mdp, struct mdp_cmdq_param *param) mdp_comp_clocks_off(&mdp->pdev->dev, cmd[i]->comps, cmd[i]->num_comps); err_cancel_job: - atomic_set(&mdp->job_count, 0); + refcount_set(&mdp->job_count, 0); return ret; } diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c index 5209f531ef8d..c1f3bf98120a 100644 --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.c @@ -380,14 +380,14 @@ static int __maybe_unused mdp_suspend(struct device *dev) atomic_set(&mdp->suspended, 1); - if (atomic_read(&mdp->job_count)) { + if (refcount_read(&mdp->job_count)) { ret = wait_event_timeout(mdp->callback_wq, - !atomic_read(&mdp->job_count), + !refcount_read(&mdp->job_count), 2 * HZ); if (ret == 0) { dev_err(dev, "%s:flushed cmdq task incomplete, count=%d\n", - __func__, atomic_read(&mdp->job_count)); + __func__, refcount_read(&mdp->job_count)); return -EBUSY; } } diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h index 8c09e984fd01..430251f63754 100644 --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-core.h @@ -134,7 +134,7 @@ struct mdp_dev { /* synchronization protect for m2m device operation */ struct mutex m2m_lock; atomic_t suspended; - atomic_t job_count; + refcount_t job_count; }; struct mdp_pipe_info { diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-m2m.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-m2m.c index 35a8b059bde5..0e69128a3772 100644 --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-m2m.c +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-m2m.c @@ -104,14 +104,14 @@ static void mdp_m2m_device_run(void *priv) task.cb_data = NULL; task.mdp_ctx = ctx; - if (atomic_read(&ctx->mdp_dev->job_count)) { + if (refcount_read(&ctx->mdp_dev->job_count)) { ret = wait_event_timeout(ctx->mdp_dev->callback_wq, - !atomic_read(&ctx->mdp_dev->job_count), + !refcount_read(&ctx->mdp_dev->job_count), 2 * HZ); if (ret == 0) { dev_err(&ctx->mdp_dev->pdev->dev, "%d jobs not yet done\n", - atomic_read(&ctx->mdp_dev->job_count)); + refcount_read(&ctx->mdp_dev->job_count)); goto worker_end; } }