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Message-Id: <20240419-fix-cocci-v2-12-2119e692309c@chromium.org>
Date: Fri, 19 Apr 2024 09:47:58 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Martin Tuma <martin.tuma@...iteqautomotive.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Hugues Fruchet <hugues.fruchet@...s.st.com>,
Alain Volmat <alain.volmat@...s.st.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Sowjanya Komatineni <skomatineni@...dia.com>,
Luca Ceresoli <luca.ceresoli@...tlin.com>,
Matthias Brugger <matthias.bgg@...il.com>,
AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
Hans Verkuil <hverkuil@...all.nl>, Sergey Kozlov <serjk@...up.ru>,
Abylay Ospan <aospan@...up.ru>,
Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
Dmitry Osipenko <digetx@...il.com>,
Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
Sylvain Petinot <sylvain.petinot@...s.st.com>,
Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
Vikash Garodia <quic_vgarodia@...cinc.com>,
Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev,
linux-sunxi@...ts.linux.dev, linux-tegra@...r.kernel.org,
linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 12/26] media: platform: mtk-mdp3: Use refcount_t for
job_count
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 <ribalda@...omium.org>
---
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;
}
}
--
2.44.0.769.g3c40516874-goog
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