Re: [PATCH 05/12] gpu/drm: Ingenic: Fix opaque pointer casted to wrong type

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Hi Sam,

Le dim. 17 mai 2020 à 8:21, Sam Ravnborg <sam@xxxxxxxxxxxx> a écrit :
On Sat, May 16, 2020 at 11:50:50PM +0200, Paul Cercueil wrote:
 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@xxxxxxxxxxxxxxx # v5.3
Fixes: 90b86fcc47b4 ("DRM: Add KMS driver for the Ingenic JZ47xx SoCs")
 Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>

Pushed to drm-misc-fixes, thanks for the review.

-Paul

 ---
  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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