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gpu/drm: Ingenic: Fix opaque pointer casted to wrong type

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[ Upstream commit abf56fadf0e208abfb13ad1ac0094416058da0ad ]

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: 90b86fcc47 ("DRM: Add KMS driver for the Ingenic JZ47xx SoCs")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200516215057.392609-5-paul@crapouillou.net
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Paul Cercueil 2020-05-16 23:50:50 +02:00 • committed by Greg Kroah-Hartman
commit 820be34d01
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/ingenic/ingenic-drm.c
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@ -467,7 +467,7 @@ 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);