From: Inki Dae Date: Tue, 25 May 2021 10:51:39 +0000 (+0900) Subject: drm/exynos: use pm_runtime_resume_and_get() X-Git-Tag: v5.15~765^2~12^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=445d3bed75de4082c7c7794030ac9a5b8bfde886;p=platform%2Fkernel%2Flinux-starfive.git drm/exynos: use pm_runtime_resume_and_get() 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 --- diff --git a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c index 197b973..9870c4e 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 9b5e6f9..12571ac 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 2d2fe5a..1d777d8 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 29ab8be..a3c7181 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 ae57612..700ca4f 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 1e0c5a7f..cab4d2c 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 b01f36e..90d7bf9 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 2d94afb..ee61be4 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 ce18571..f9ae5b0 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 39fa5d3..f893731 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 af192e5..41c54f1f 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);