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Wed, 26 May 2021 08:27:32 +0000 (GMT) From: Inki Dae To: dri-devel@lists.freedesktop.org, linux-samsung-soc@vger.kernel.org Cc: airlied@linux.ie, Inki Dae , kernel test robot Subject: [PATCH v2] drm/exynos: use pm_runtime_resume_and_get() Date: Wed, 26 May 2021 17:37:03 +0900 Message-Id: <20210526083703.323886-1-inki.dae@samsung.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrGKsWRmVeSWpSXmKPExsWy7bCmrm4p27oEg8XPJCx6z51ksrjy9T2b xaT7E1gsZpzfx2TxqvkRmwOrx+I9L5k8tn97wOpxv/s4k0ffllWMHp83yQWwRmXbZKQmpqQW KaTmJeenZOal2yp5B8c7x5uaGRjqGlpamCsp5CXmptoqufgE6Lpl5gAtV1IoS8wpBQoFJBYX K+nb2RTll5akKmTkF5fYKqUWpOQUWBboFSfmFpfmpesl5+daGRoYGJkCFSZkZ3TObmMv6A+o +PHlFnsD4xXnLkZODgkBE4lP69eydzFycQgJ7GCU2LBoOROE84lR4kHTeijnM6PE00tvWLoY OcBaTp2KhojvYpS40zqFEWSUkMAXRomDD2RBbDYBVYmJK+6zgdgiAm4STYdnsoLYzAJREm+W zgOLCwvYS5z7vpMdxGYBql+8cx1YDa+AlcSPb69YIM6Tl5h56Ts7RFxQ4uTMJywQc+QlmrfO ZgY5QkJgH7vE7NYNrBANLhL3/m9gh7CFJV4d3wJlS0m87G9jh2hoZpSYOOM0E4TTwShx9/F1 qHXGEvuXTmYCeZNZQFNi/S59iLCixM7fcxkhNvNJvPvawwoJCV6JjjYhiBIliWMXbzBC2BIS F5ZMZIOwPST2fFvHBgmgWInOBVeYJjDKz0Lyzywk/8xCWLyAkXkVo1hqQXFuemqxYYExcqxu YgQnQC3zHYzT3n7QO8TIxMF4iFGCg1lJhPdg89oEId6UxMqq1KL8+KLSnNTiQ4ymwBCeyCwl mpwPTMF5JfGGpkbGxsYWJoZmpoaGSuK86c7VCUIC6YklqdmpqQWpRTB9TBycUg1Ml8/f6rd9 9DlA/njUfq0CiSPLap905jE3mp26LnRCwbb9YYcdy6b/GzdFqws2Kv1+uE87nXW19avGSyUL pxwRUJLdYPpENCAgcIb0OqOqy2by9nYMEa8SHZc+yVh+KqfWOVDW6XG037HA4NUn+q9ueMKd fjZTprg7MkZv82UpV9/nX2tuLti1fm6shUrLXp27Tw/s5J2e9l2PS31b14O8WjXFoyvD1opo KEpGchzQYv/Hf9tW/+f2t5M/Znd7J/MIWLY1X95+4cX3vTVaErnp5S0nTEVOfSqPV9/9fE3w vHNz/55Q1dU5aH+jIqnIaXOxGcvcVxONZ37TuxDV+1ng8cyoveeT9jwzEG/Jm3BOiaU4I9FQ i7moOBEASTbgswkEAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrELMWRmVeSWpSXmKPExsWy7bCSvG4J27oEg/ZZ6ha9504yWVz5+p7N YtL9CSwWM87vY7J41fyIzYHVY/Gel0we2789YPW4332cyaNvyypGj8+b5AJYo7hsUlJzMstS i/TtErgyOme3sRf0B1T8+HKLvYHxinMXIweHhICJxKlT0V2MXBxCAjsYJdbP7GKFiEtIbNnK AWEKSxw+XAxR8olR4tSW9SxdjJwcbAKqEhNX3GcDsUUEPCSavx1nB7GZBWIkXr1fCxYXFrCX OPd9J1icBah+8c51rCA2r4CVxI9vr8DmSAjIS8y89J0dIi4ocXLmExaIOfISzVtnM09g5JuF JDULSWoBI9MqRsnUguLc9NxiwwKjvNRyveLE3OLSvHS95PzcTYzgYNTS2sG4Z9UHvUOMTByM hxglOJiVRHgPNq9NEOJNSaysSi3Kjy8qzUktPsQozcGiJM57oetkvJBAemJJanZqakFqEUyW iYNTqoGphW17eK1cxbvK93yblYzFCyS3/bU+rNu3Kzfl5s4X3gu+H2W6XCd++NaX8ozfHC/v 6R3+9JpfcKmc9r9Sz4ryV58bZ0d+Pjdr5afy9KelbhfuFUzfUDBP5kawsk71huD11QXnj+TM LftrOz9047M/xefzT0/m39V2M/2FcH1k4U7+/nxdh317nh4JZ/yTeH2f+vFl20qLJiv5/WoS 9Sm8L92dqfPA/sWO+oNTTix9mpnCsv300cLGf883T1tZPPW3yb3MyxLN9+Rd3gvlhlYInXSd XOm4919OQm+TFb/NXCO7vpdcv2OOWD877PUvxDGiIeb6jCxjibLF9w492JmSOmu1hAhr7L0T O97JG4iJKrEUZyQaajEXFScCAP5eXIa1AgAA X-CMS-MailID: 20210526082732epcas1p189154b27b71df8bd063b5ac1ceb0b3d7 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-Sendblock-Type: SVC_REQ_APPROVE CMS-TYPE: 101P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20210526082732epcas1p189154b27b71df8bd063b5ac1ceb0b3d7 References: Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Use pm_runtime_resume_and_get() instead of pm_runtime_get_sync() to deal with usage counter. pm_runtime_get_sync() increases the usage counter even when it failed, which makes callers to forget to decrease the usage counter and resulted in reference leak. pm_runtime_resume_and_get() function decreases the usage counter when it failed internally so it can avoid the reference leak. Changelog v1: - Fix an build error reported by kernel test robot of Intel. Signed-off-by: Inki Dae Reported-by: kernel test robot --- drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 7 +++++- drivers/gpu/drm/exynos/exynos7_drm_decon.c | 7 +++++- drivers/gpu/drm/exynos/exynos_drm_dsi.c | 7 +++++- drivers/gpu/drm/exynos/exynos_drm_fimc.c | 8 +++++- drivers/gpu/drm/exynos/exynos_drm_fimd.c | 25 +++++++++++++++---- drivers/gpu/drm/exynos/exynos_drm_g2d.c | 9 ++++++- drivers/gpu/drm/exynos/exynos_drm_gsc.c | 7 +++++- drivers/gpu/drm/exynos/exynos_drm_rotator.c | 7 +++++- drivers/gpu/drm/exynos/exynos_drm_scaler.c | 10 +++++--- drivers/gpu/drm/exynos/exynos_hdmi.c | 8 +++++- drivers/gpu/drm/exynos/exynos_mixer.c | 7 +++++- 11 files changed, 84 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c index b9a4b7670a89..63dd85af13f2 100644 --- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c @@ -513,8 +513,13 @@ static void decon_swreset(struct decon_context *ctx) static void decon_atomic_enable(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; + int ret; - pm_runtime_get_sync(ctx->dev); + ret = pm_runtime_resume_and_get(ctx->dev); + if (ret < 0) { + DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n"); + return; + } exynos_drm_pipe_clk_enable(crtc, true); diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c index 431c5d32f9a4..b61edc54e66f 100644 --- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c +++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c @@ -531,11 +531,16 @@ static void decon_init(struct decon_context *ctx) static void decon_atomic_enable(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; + int ret; if (!ctx->suspended) return; - pm_runtime_get_sync(ctx->dev); + ret = pm_runtime_resume_and_get(ctx->dev); + if (ret < 0) { + DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n"); + return; + } decon_init(ctx); diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c index 44e402b7cdfb..5bb1388a8b18 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c +++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c @@ -1383,7 +1383,12 @@ static void exynos_dsi_enable(struct drm_encoder *encoder) if (dsi->state & DSIM_STATE_ENABLED) return; - pm_runtime_get_sync(dsi->dev); + ret = pm_runtime_resume_and_get(dsi->dev); + if (ret < 0) { + dev_err(dsi->dev, "failed to enable DSI device.\n"); + return; + } + dsi->state |= DSIM_STATE_ENABLED; if (dsi->panel) { diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimc.c b/drivers/gpu/drm/exynos/exynos_drm_fimc.c index 29ab8be8604c..a3c718148c45 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimc.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimc.c @@ -1085,8 +1085,14 @@ static int fimc_commit(struct exynos_drm_ipp *ipp, { struct fimc_context *ctx = container_of(ipp, struct fimc_context, ipp); + int ret; + + ret = pm_runtime_resume_and_get(ctx->dev); + if (ret < 0) { + dev_err(ctx->dev, "failed to enable FIMC device.\n"); + return ret; + } - pm_runtime_get_sync(ctx->dev); ctx->task = task; fimc_src_set_fmt(ctx, task->src.buf.fourcc, task->src.buf.modifier); diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index 49a2e0c53918..5955bd90accb 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -343,13 +343,18 @@ static void fimd_enable_shadow_channel_path(struct fimd_context *ctx, writel(val, ctx->regs + SHADOWCON); } -static void fimd_clear_channels(struct exynos_drm_crtc *crtc) +static int fimd_clear_channels(struct exynos_drm_crtc *crtc) { struct fimd_context *ctx = crtc->ctx; unsigned int win, ch_enabled = 0; + int ret; /* Hardware is in unknown state, so ensure it gets enabled properly */ - pm_runtime_get_sync(ctx->dev); + ret = pm_runtime_resume_and_get(ctx->dev); + if (ret < 0) { + dev_err(ctx->dev, "failed to enable FIMD device.\n"); + return ret; + } clk_prepare_enable(ctx->bus_clk); clk_prepare_enable(ctx->lcd_clk); @@ -384,6 +389,8 @@ static void fimd_clear_channels(struct exynos_drm_crtc *crtc) clk_disable_unprepare(ctx->bus_clk); pm_runtime_put(ctx->dev); + + return 0; } @@ -905,7 +912,10 @@ static void fimd_atomic_enable(struct exynos_drm_crtc *crtc) ctx->suspended = false; - pm_runtime_get_sync(ctx->dev); + if (pm_runtime_resume_and_get(ctx->dev) < 0) { + dev_warn(ctx->dev, "failed to enable FIMD device.\n"); + return; + } /* if vblank was enabled status, enable it again. */ if (test_and_clear_bit(0, &ctx->irq_flags)) @@ -1089,8 +1099,13 @@ static int fimd_bind(struct device *dev, struct device *master, void *data) if (ctx->encoder) exynos_dpi_bind(drm_dev, ctx->encoder); - if (is_drm_iommu_supported(drm_dev)) - fimd_clear_channels(ctx->crtc); + if (is_drm_iommu_supported(drm_dev)) { + int ret; + + ret = fimd_clear_channels(ctx->crtc); + if (ret < 0) + return ret; + } return exynos_drm_register_dma(drm_dev, dev, &ctx->dma_priv); } diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c index 1e0c5a7f206e..cab4d2c370a7 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c +++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c @@ -892,7 +892,14 @@ static void g2d_runqueue_worker(struct work_struct *work) g2d->runqueue_node = g2d_get_runqueue_node(g2d); if (g2d->runqueue_node) { - pm_runtime_get_sync(g2d->dev); + int ret; + + ret = pm_runtime_resume_and_get(g2d->dev); + if (ret < 0) { + dev_err(g2d->dev, "failed to enable G2D device.\n"); + return; + } + g2d_dma_start(g2d, g2d->runqueue_node); } } diff --git a/drivers/gpu/drm/exynos/exynos_drm_gsc.c b/drivers/gpu/drm/exynos/exynos_drm_gsc.c index b01f36e76eaf..90d7bf906885 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_gsc.c +++ b/drivers/gpu/drm/exynos/exynos_drm_gsc.c @@ -1118,7 +1118,12 @@ static int gsc_commit(struct exynos_drm_ipp *ipp, struct gsc_context *ctx = container_of(ipp, struct gsc_context, ipp); int ret; - pm_runtime_get_sync(ctx->dev); + ret = pm_runtime_resume_and_get(ctx->dev); + if (ret < 0) { + dev_err(ctx->dev, "failed to enable GScaler device.\n"); + return ret; + } + ctx->task = task; ret = gsc_reset(ctx); diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c b/drivers/gpu/drm/exynos/exynos_drm_rotator.c index 2d94afba031e..ee61be4cf152 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_rotator.c +++ b/drivers/gpu/drm/exynos/exynos_drm_rotator.c @@ -219,8 +219,13 @@ static int rotator_commit(struct exynos_drm_ipp *ipp, { struct rot_context *rot = container_of(ipp, struct rot_context, ipp); + int ret; - pm_runtime_get_sync(rot->dev); + ret = pm_runtime_resume_and_get(rot->dev); + if (ret < 0) { + dev_err(rot->dev, "failed to enable ROTATOR device.\n"); + return ret; + } rot->task = task; rotator_src_set_fmt(rot, task->src.buf.fourcc); diff --git a/drivers/gpu/drm/exynos/exynos_drm_scaler.c b/drivers/gpu/drm/exynos/exynos_drm_scaler.c index ce1857138f89..f9ae5b038d59 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_scaler.c +++ b/drivers/gpu/drm/exynos/exynos_drm_scaler.c @@ -362,15 +362,17 @@ static int scaler_commit(struct exynos_drm_ipp *ipp, struct drm_exynos_ipp_task_rect *src_pos = &task->src.rect; struct drm_exynos_ipp_task_rect *dst_pos = &task->dst.rect; const struct scaler_format *src_fmt, *dst_fmt; + int ret = 0; src_fmt = scaler_get_format(task->src.buf.fourcc); dst_fmt = scaler_get_format(task->dst.buf.fourcc); - pm_runtime_get_sync(scaler->dev); - if (scaler_reset(scaler)) { - pm_runtime_put(scaler->dev); + ret = pm_runtime_resume_and_get(scaler->dev); + if (ret < 0) + return ret; + + if (scaler_reset(scaler)) return -EIO; - } scaler->task = task; diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index 39fa5d3b01ef..f893731d6021 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -1483,10 +1483,16 @@ static void hdmi_set_refclk(struct hdmi_context *hdata, bool on) /* Should be called with hdata->mutex mutex held. */ static void hdmiphy_enable(struct hdmi_context *hdata) { + int ret; + if (hdata->powered) return; - pm_runtime_get_sync(hdata->dev); + ret = pm_runtime_resume_and_get(hdata->dev); + if (ret < 0) { + dev_err(hdata->dev, "failed to enable HDMIPHY device.\n"); + return; + } if (regulator_bulk_enable(ARRAY_SIZE(supply), hdata->regul_bulk)) DRM_DEV_DEBUG_KMS(hdata->dev, diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index af192e5a16ef..41c54f1f60bc 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -992,11 +992,16 @@ static void mixer_atomic_flush(struct exynos_drm_crtc *crtc) static void mixer_atomic_enable(struct exynos_drm_crtc *crtc) { struct mixer_context *ctx = crtc->ctx; + int ret; if (test_bit(MXR_BIT_POWERED, &ctx->flags)) return; - pm_runtime_get_sync(ctx->dev); + ret = pm_runtime_resume_and_get(ctx->dev); + if (ret < 0) { + dev_err(ctx->dev, "failed to enable MIXER device.\n"); + return; + } exynos_drm_pipe_clk_enable(crtc, true); -- 2.25.1