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

[Sam Ravnborg]

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: sta...@vger.kernel.org # v5.3
> Fixes: 90b86fcc47b4 ("DRM: Add KMS driver for the Ingenic JZ47xx SoCs")
> Signed-off-by: Paul Cercueil <p...@crapouillou.net>
Acked-by: Sam Ravnborg <s...@ravnborg.org>
> ---
>  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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