[PATCH] drm/sun4i: Fix crash during suspend after component bind failure

[Jernej Škrabec]

Dne sreda, 15. junij 2022 ob 07:42:53 CEST je Samuel Holland napisal(a):
> If the component driver fails to bind, or is unbound, the driver data
> for the top-level platform device points to a freed drm_device. If the
> system is then suspended, the driver passes this dangling pointer to
> drm_mode_config_helper_suspend(), which crashes.
> 
> Fix this by only setting the driver data while the platform driver holds
> a reference to the drm_device.
> 
> Fixes: 624b4b48d9d8 ("drm: sun4i: Add support for suspending the display 
driver")
> Signed-off-by: Samuel Holland <samuel at sholland.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec at gmail.com>

Best regards,
Jernej