From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
linux-samsung-soc@vger.kernel.org,
dri-devel@lists.freedesktop.org, Inki Dae <inki.dae@samsung.com>,
Andrzej Hajda <a.hajda@samsung.com>,
linux-arm-kernel@lists.infradead.org,
Marek Szyprowski <m.szyprowski@samsung.com>
Subject: [PATCH AUTOSEL 5.4 18/35] drm/exynos: hdmi: don't leak enable HDMI_EN regulator if probe fails
Date: Sun, 15 Mar 2020 22:33:54 -0400 [thread overview]
Message-ID: <20200316023411.1263-18-sashal@kernel.org> (raw)
In-Reply-To: <20200316023411.1263-1-sashal@kernel.org>
From: Marek Szyprowski <m.szyprowski@samsung.com>
[ Upstream commit 3b6a9b19ab652efac7ad4c392add6f1235019568 ]
Move enabling and disabling HDMI_EN optional regulator to probe() function
to keep track on the regulator status. This fixes following warning if
probe() fails (for example when I2C DDC adapter cannot be yet gathered
due to the missing driver). This fixes following warning observed on
Arndale5250 board with multi_v7_defconfig:
[drm] Failed to get ddc i2c adapter by node
------------[ cut here ]------------
WARNING: CPU: 0 PID: 214 at drivers/regulator/core.c:2051 _regulator_put+0x16c/0x184
Modules linked in: ...
CPU: 0 PID: 214 Comm: systemd-udevd Not tainted 5.6.0-rc2-next-20200219-00040-g38af1dfafdbb #7570
Hardware name: Samsung Exynos (Flattened Device Tree)
[<c0312258>] (unwind_backtrace) from [<c030cc10>] (show_stack+0x10/0x14)
[<c030cc10>] (show_stack) from [<c0f0d3a0>] (dump_stack+0xcc/0xe0)
[<c0f0d3a0>] (dump_stack) from [<c0346a58>] (__warn+0xe0/0xf8)
[<c0346a58>] (__warn) from [<c0346b20>] (warn_slowpath_fmt+0xb0/0xb8)
[<c0346b20>] (warn_slowpath_fmt) from [<c0893f58>] (_regulator_put+0x16c/0x184)
[<c0893f58>] (_regulator_put) from [<c0893f8c>] (regulator_put+0x1c/0x2c)
[<c0893f8c>] (regulator_put) from [<c09b2664>] (release_nodes+0x17c/0x200)
[<c09b2664>] (release_nodes) from [<c09aebe8>] (really_probe+0x10c/0x350)
[<c09aebe8>] (really_probe) from [<c09aefa8>] (driver_probe_device+0x60/0x1a0)
[<c09aefa8>] (driver_probe_device) from [<c09af288>] (device_driver_attach+0x58/0x60)
[<c09af288>] (device_driver_attach) from [<c09af310>] (__driver_attach+0x80/0xbc)
[<c09af310>] (__driver_attach) from [<c09ace34>] (bus_for_each_dev+0x68/0xb4)
[<c09ace34>] (bus_for_each_dev) from [<c09ae00c>] (bus_add_driver+0x130/0x1e8)
[<c09ae00c>] (bus_add_driver) from [<c09afd98>] (driver_register+0x78/0x110)
[<c09afd98>] (driver_register) from [<bf139558>] (exynos_drm_init+0xe8/0x11c [exynosdrm])
[<bf139558>] (exynos_drm_init [exynosdrm]) from [<c0302fa8>] (do_one_initcall+0x50/0x220)
[<c0302fa8>] (do_one_initcall) from [<c03dc02c>] (do_init_module+0x60/0x210)
[<c03dc02c>] (do_init_module) from [<c03daf44>] (load_module+0x1c0c/0x2310)
[<c03daf44>] (load_module) from [<c03db85c>] (sys_finit_module+0xac/0xbc)
[<c03db85c>] (sys_finit_module) from [<c0301000>] (ret_fast_syscall+0x0/0x54)
Exception stack(0xecca3fa8 to 0xecca3ff0)
...
---[ end trace 276c91214635905c ]---
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/exynos/exynos_hdmi.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 09aa73c0f2add..0073a2b3b80a2 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -1802,18 +1802,10 @@ static int hdmi_resources_init(struct hdmi_context *hdata)
hdata->reg_hdmi_en = devm_regulator_get_optional(dev, "hdmi-en");
- if (PTR_ERR(hdata->reg_hdmi_en) != -ENODEV) {
+ if (PTR_ERR(hdata->reg_hdmi_en) != -ENODEV)
if (IS_ERR(hdata->reg_hdmi_en))
return PTR_ERR(hdata->reg_hdmi_en);
- ret = regulator_enable(hdata->reg_hdmi_en);
- if (ret) {
- DRM_DEV_ERROR(dev,
- "failed to enable hdmi-en regulator\n");
- return ret;
- }
- }
-
return hdmi_bridge_init(hdata);
}
@@ -2020,6 +2012,15 @@ static int hdmi_probe(struct platform_device *pdev)
}
}
+ if (!IS_ERR(hdata->reg_hdmi_en)) {
+ ret = regulator_enable(hdata->reg_hdmi_en);
+ if (ret) {
+ DRM_DEV_ERROR(dev,
+ "failed to enable hdmi-en regulator\n");
+ goto err_hdmiphy;
+ }
+ }
+
pm_runtime_enable(dev);
audio_infoframe = &hdata->audio.infoframe;
@@ -2044,7 +2045,8 @@ static int hdmi_probe(struct platform_device *pdev)
err_rpm_disable:
pm_runtime_disable(dev);
-
+ if (!IS_ERR(hdata->reg_hdmi_en))
+ regulator_disable(hdata->reg_hdmi_en);
err_hdmiphy:
if (hdata->hdmiphy_port)
put_device(&hdata->hdmiphy_port->dev);
--
2.20.1
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next prev parent reply other threads:[~2020-03-16 2:40 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200316023411.1263-1-sashal@kernel.org>
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 03/35] drm/mediatek: Find the cursor plane instead of hard coding it Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 04/35] ARM: dts: imx6dl-colibri-eval-v3: fix sram compatible properties Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 08/35] ASoC: meson: g12a: add tohdmitx reset Sasha Levin
2020-03-16 8:28 ` Jerome Brunet
2020-03-22 18:31 ` Jerome Brunet
2020-03-22 19:39 ` Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 14/35] spi: pxa2xx: Add CS control clock quirk Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 15/35] spi/zynqmp: remove entry that causes a cs glitch Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 16/35] drm/exynos: dsi: propagate error value and silence meaningless warning Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 17/35] drm/exynos: dsi: fix workaround for the legacy clock name Sasha Levin
2020-03-16 2:33 ` Sasha Levin [this message]
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 19/35] drivers/perf: fsl_imx8_ddr: Correct the CLEAR bit definition Sasha Levin
2020-03-16 2:33 ` [PATCH AUTOSEL 5.4 20/35] drivers/perf: arm_pmu_acpi: Fix incorrect checking of gicc pointer Sasha Levin
2020-03-16 2:34 ` [PATCH AUTOSEL 5.4 25/35] ASoC: stm32: sai: manage rebind issue Sasha Levin
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