linux-kernel - Re: [PATCH 1/2] drm/vc4: Account for interrupts in flight

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Message-ID: <8760add69e.fsf@anholt.net>
Date:   Mon, 13 Nov 2017 16:59:57 -0800
From:   Eric Anholt <eric@...olt.net>
To:     Stefan Schake <stschake@...il.com>, dri-devel@...ts.freedesktop.org
Cc:     linux-rpi-kernel@...ts.infradead.org,
        Stefan Schake <stschake@...il.com>,
        David Airlie <airlied@...ux.ie>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] drm/vc4: Account for interrupts in flight

Stefan Schake <stschake@...il.com> writes:

> Synchronously disable the IRQ to make the following cancel_work_sync
> invocation effective.
>
> An interrupt in flight could enqueue further overflow mem work. As we
> free the binner BO immediately following vc4_irq_uninstall this caused
> a NULL pointer dereference in the work callback vc4_overflow_mem_work.
>
> Link: https://github.com/anholt/linux/issues/114
> Signed-off-by: Stefan Schake <stschake@...il.com>
> Fixes: d5b1a78a772f ("drm/vc4: Add support for drawing 3D frames.")

Reviewed and applied this one.  Thanks!

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