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From: Paul Cercueil <paul@crapouillou.net>
To: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J . Wysocki" <rafael@kernel.org>
Cc: od@zcrc.me, dri-devel@lists.freedesktop.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	Paul Cercueil <paul@crapouillou.net>,
	stable@vger.kernel.org
Subject: [PATCH 05/12] gpu/drm: Ingenic: Fix opaque pointer casted to wrong type
Date: Sat, 16 May 2020 23:50:50 +0200	[thread overview]
Message-ID: <20200516215057.392609-5-paul@crapouillou.net> (raw)
In-Reply-To: <20200516215057.392609-1-paul@crapouillou.net>

The opaque pointer passed to the IRQ handler is a pointer to the
drm_device, not a pointer to our ingenic_drm structure.

It still worked, because our ingenic_drm structure contains the
drm_device as its first field, so the pointer received had the same
value, but this was not semantically correct.

Cc: stable@vger.kernel.org # v5.3
Fixes: 90b86fcc47b4 ("DRM: Add KMS driver for the Ingenic JZ47xx SoCs")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 drivers/gpu/drm/ingenic/ingenic-drm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm.c b/drivers/gpu/drm/ingenic/ingenic-drm.c
index 0c472382a08b..97244462599b 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm.c
@@ -476,7 +476,7 @@ static int ingenic_drm_encoder_atomic_check(struct drm_encoder *encoder,
 
 static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg)
 {
-	struct ingenic_drm *priv = arg;
+	struct ingenic_drm *priv = drm_device_get_priv(arg);
 	unsigned int state;
 
 	regmap_read(priv->map, JZ_REG_LCD_STATE, &state);
-- 
2.26.2


WARNING: multiple messages have this Message-ID (diff)
From: Paul Cercueil <paul@crapouillou.net>
To: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
	Rob Herring <robh+dt@kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J . Wysocki" <rafael@kernel.org>
Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	stable@vger.kernel.org, Paul Cercueil <paul@crapouillou.net>,
	od@zcrc.me, dri-devel@lists.freedesktop.org
Subject: [PATCH 05/12] gpu/drm: Ingenic: Fix opaque pointer casted to wrong type
Date: Sat, 16 May 2020 23:50:50 +0200	[thread overview]
Message-ID: <20200516215057.392609-5-paul@crapouillou.net> (raw)
In-Reply-To: <20200516215057.392609-1-paul@crapouillou.net>

The opaque pointer passed to the IRQ handler is a pointer to the
drm_device, not a pointer to our ingenic_drm structure.

It still worked, because our ingenic_drm structure contains the
drm_device as its first field, so the pointer received had the same
value, but this was not semantically correct.

Cc: stable@vger.kernel.org # v5.3
Fixes: 90b86fcc47b4 ("DRM: Add KMS driver for the Ingenic JZ47xx SoCs")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 drivers/gpu/drm/ingenic/ingenic-drm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm.c b/drivers/gpu/drm/ingenic/ingenic-drm.c
index 0c472382a08b..97244462599b 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm.c
@@ -476,7 +476,7 @@ static int ingenic_drm_encoder_atomic_check(struct drm_encoder *encoder,
 
 static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg)
 {
-	struct ingenic_drm *priv = arg;
+	struct ingenic_drm *priv = drm_device_get_priv(arg);
 	unsigned int state;
 
 	regmap_read(priv->map, JZ_REG_LCD_STATE, &state);
-- 
2.26.2

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dri-devel@lists.freedesktop.org
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  parent reply	other threads:[~2020-05-16 21:51 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-16 21:50 [PATCH 01/12] dt-bindings: display: Convert ingenic,lcd.txt to YAML Paul Cercueil
2020-05-16 21:50 ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 02/12] dt-bindings: display: Add ingenic,ipu.yaml Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-17  6:17   ` Sam Ravnborg
2020-05-17  6:17     ` Sam Ravnborg
2020-05-17 11:06     ` Paul Cercueil
2020-05-17 11:06       ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 03/12] component: Support binding with no matches Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 04/12] gpu/drm: ingenic: Fix bogus crtc_atomic_check callback Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-17  6:17   ` Sam Ravnborg
2020-05-17  6:17     ` Sam Ravnborg
2020-05-17 12:19     ` Paul Cercueil
2020-05-17 12:19       ` Paul Cercueil
2020-05-16 21:50 ` Paul Cercueil [this message]
2020-05-16 21:50   ` [PATCH 05/12] gpu/drm: Ingenic: Fix opaque pointer casted to wrong type Paul Cercueil
2020-05-17  6:21   ` Sam Ravnborg
2020-05-17  6:21     ` Sam Ravnborg
2020-05-17 12:19     ` Paul Cercueil
2020-05-17 12:19       ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 06/12] gpu/drm: Ingenic: Fix incorrect assumption about plane->index Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-19 11:49   ` Sasha Levin
2020-05-19 11:49     ` Sasha Levin
2020-05-16 21:50 ` [PATCH 07/12] gpu/drm: ingenic: Set DMA descriptor chain address in probe Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 08/12] gpu/drm: Ingenic: Move register definitions to ingenic-drm.h Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 09/12] gpu/drm: Ingenic: Add support for OSD mode Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 10/12] gpu/drm: Ingenic: Register driver as component master Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-16 21:50 ` [PATCH 11/12] gpu/drm: Ingenic: Add support for the IPU Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-18 10:48   ` Emil Velikov
2020-05-18 10:48     ` Emil Velikov
2020-05-18 11:26     ` Paul Cercueil
2020-05-18 11:26       ` Paul Cercueil
2020-05-19 17:10       ` Paul Boddie
2020-05-19 17:10         ` Paul Boddie
2020-05-16 21:50 ` [PATCH 12/12] gpu/drm: Ingenic: Support multiple panels/bridges Paul Cercueil
2020-05-16 21:50   ` Paul Cercueil
2020-05-17  6:12 ` [PATCH 01/12] dt-bindings: display: Convert ingenic,lcd.txt to YAML Sam Ravnborg
2020-05-17  6:12   ` Sam Ravnborg
2020-05-28 20:17 ` Rob Herring
2020-05-28 20:17   ` Rob Herring

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