* [PATCH v2] drm/exynos: use pm_runtime_resume_and_get()
[not found] <CGME20210526082732epcas1p189154b27b71df8bd063b5ac1ceb0b3d7@epcas1p1.samsung.com>
@ 2021-05-26 8:37 ` Inki Dae
0 siblings, 0 replies; only message in thread
From: Inki Dae @ 2021-05-26 8:37 UTC (permalink / raw)
To: dri-devel, linux-samsung-soc; +Cc: airlied, Inki Dae, kernel test robot
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 <inki.dae@samsung.com>
Reported-by: kernel test robot <lkp@intel.com>
---
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
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