Re: [PATCH v2] drm/rockchip: dw_hdmi_qp: attach the HDMI Colorspace connector property

[Igor Paunovic <royalnet026@gmail.com>]

Hi,

Thank you for the review.

The lifetime mismatch is real and worth spelling out precisely: hdmi is
allocated with drmm_kzalloc() against the DRM device, while the HPD
interrupt is registered with devm_request_threaded_irq() against the
component's platform device, with hdmi as the cookie and IRQF_SHARED
set. The bind error paths that follow the IRQ registration predate this
patch: encoder init, dw_hdmi_qp_bind() and drm_bridge_connector_init()
can all return with the handler still registered. This patch adds one
more such return, which can only trigger if the property allocation
fails under memory pressure.

So the issue is pre-existing, correctly flagged as such, and this change
does not alter the exposure in any practical way. The clean fix looks
orthogonal to this patch: register the IRQ with plain
request_threaded_irq() and tie its release to the DRM device with
drmm_add_action_or_reset(), so the handler cannot outlive the structure
it dereferences. Happy to send that as a separate follow-up if the
maintainers think it is worth doing.

Thanks,
Igor