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From: Marco Felsch <m.felsch@pengutronix.de>
To: p.zabel@pengutronix.de, airlied@linux.ie, daniel@ffwll.ch,
	shawnguo@kernel.org, stefan@agner.ch, rmk+kernel@armlinux.org.uk
Cc: dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de
Subject: [PATCH 2/2] drm/imx: tve: fix regulator_disable error path
Date: Thu, 11 Jun 2020 14:43:32 +0200	[thread overview]
Message-ID: <20200611124332.20819-2-m.felsch@pengutronix.de> (raw)
In-Reply-To: <20200611124332.20819-1-m.felsch@pengutronix.de>

Add missing regulator_disable() as devm_action to avoid dedicated
unbind() callback and fix the missing error handling.

Fixes: fcbc51e54d2a ("staging: drm/imx: Add support for Television Encoder (TVEv2)")
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
Note: This patch depends on: 14422f14da81 ("component: allow missing
unbind callback")

 drivers/gpu/drm/imx/imx-tve.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 9fd4b464e829..f91c3eb7697b 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -494,6 +494,13 @@ static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
 	return 0;
 }
 
+static void imx_tve_disable_regulator(void *data)
+{
+	struct imx_tve *tve = data;
+
+	regulator_disable(tve->dac_reg);
+}
+
 static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
 {
 	return (reg % 4 == 0) && (reg <= 0xdc);
@@ -617,6 +624,9 @@ static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 		ret = regulator_enable(tve->dac_reg);
 		if (ret)
 			return ret;
+		ret = devm_add_action_or_reset(dev, imx_tve_disable_regulator, tve);
+		if (ret)
+			return ret;
 	}
 
 	tve->clk = devm_clk_get(dev, "tve");
@@ -661,18 +671,8 @@ static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 	return 0;
 }
 
-static void imx_tve_unbind(struct device *dev, struct device *master,
-	void *data)
-{
-	struct imx_tve *tve = dev_get_drvdata(dev);
-
-	if (!IS_ERR(tve->dac_reg))
-		regulator_disable(tve->dac_reg);
-}
-
 static const struct component_ops imx_tve_ops = {
 	.bind	= imx_tve_bind,
-	.unbind	= imx_tve_unbind,
 };
 
 static int imx_tve_probe(struct platform_device *pdev)
-- 
2.20.1


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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
From: Marco Felsch <m.felsch@pengutronix.de>
To: p.zabel@pengutronix.de, airlied@linux.ie, daniel@ffwll.ch,
	shawnguo@kernel.org, stefan@agner.ch, rmk+kernel@armlinux.org.uk
Cc: dri-devel@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de
Subject: [PATCH 2/2] drm/imx: tve: fix regulator_disable error path
Date: Thu, 11 Jun 2020 14:43:32 +0200	[thread overview]
Message-ID: <20200611124332.20819-2-m.felsch@pengutronix.de> (raw)
In-Reply-To: <20200611124332.20819-1-m.felsch@pengutronix.de>

Add missing regulator_disable() as devm_action to avoid dedicated
unbind() callback and fix the missing error handling.

Fixes: fcbc51e54d2a ("staging: drm/imx: Add support for Television Encoder (TVEv2)")
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
Note: This patch depends on: 14422f14da81 ("component: allow missing
unbind callback")

 drivers/gpu/drm/imx/imx-tve.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/imx/imx-tve.c b/drivers/gpu/drm/imx/imx-tve.c
index 9fd4b464e829..f91c3eb7697b 100644
--- a/drivers/gpu/drm/imx/imx-tve.c
+++ b/drivers/gpu/drm/imx/imx-tve.c
@@ -494,6 +494,13 @@ static int imx_tve_register(struct drm_device *drm, struct imx_tve *tve)
 	return 0;
 }
 
+static void imx_tve_disable_regulator(void *data)
+{
+	struct imx_tve *tve = data;
+
+	regulator_disable(tve->dac_reg);
+}
+
 static bool imx_tve_readable_reg(struct device *dev, unsigned int reg)
 {
 	return (reg % 4 == 0) && (reg <= 0xdc);
@@ -617,6 +624,9 @@ static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 		ret = regulator_enable(tve->dac_reg);
 		if (ret)
 			return ret;
+		ret = devm_add_action_or_reset(dev, imx_tve_disable_regulator, tve);
+		if (ret)
+			return ret;
 	}
 
 	tve->clk = devm_clk_get(dev, "tve");
@@ -661,18 +671,8 @@ static int imx_tve_bind(struct device *dev, struct device *master, void *data)
 	return 0;
 }
 
-static void imx_tve_unbind(struct device *dev, struct device *master,
-	void *data)
-{
-	struct imx_tve *tve = dev_get_drvdata(dev);
-
-	if (!IS_ERR(tve->dac_reg))
-		regulator_disable(tve->dac_reg);
-}
-
 static const struct component_ops imx_tve_ops = {
 	.bind	= imx_tve_bind,
-	.unbind	= imx_tve_unbind,
 };
 
 static int imx_tve_probe(struct platform_device *pdev)
-- 
2.20.1

_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel

  reply	other threads:[~2020-06-11 12:44 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-11 12:43 [PATCH 1/2] drm/imx: fix use after free Marco Felsch
2020-06-11 12:43 ` Marco Felsch
2020-06-11 12:43 ` Marco Felsch [this message]
2020-06-11 12:43   ` [PATCH 2/2] drm/imx: tve: fix regulator_disable error path Marco Felsch
2020-06-11 13:01 ` [PATCH 1/2] drm/imx: fix use after free Russell King - ARM Linux admin
2020-06-11 13:01   ` Russell King - ARM Linux admin
2020-06-11 14:51   ` Philipp Zabel
2020-06-11 14:51     ` Philipp Zabel
2020-07-20 13:22 ` Philipp Zabel
2020-07-20 13:22   ` Philipp Zabel

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