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From: Eric Anholt <eric@anholt.net>
To: dri-devel@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>,
	linux-kernel@vger.kernel.org,
	linux-rpi-kernel@lists.infradead.org,
	Stefan Schake <stschake@gmail.com>
Subject: Re: [PATCH 1/2] drm/vc4: Account for interrupts in flight
Date: Mon, 13 Nov 2017 16:59:57 -0800	[thread overview]
Message-ID: <8760add69e.fsf@anholt.net> (raw)
In-Reply-To: <1510275907-993-2-git-send-email-stschake@gmail.com>


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Stefan Schake <stschake@gmail.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@gmail.com>
> Fixes: d5b1a78a772f ("drm/vc4: Add support for drawing 3D frames.")

Reviewed and applied this one.  Thanks!

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WARNING: multiple messages have this Message-ID (diff)
From: Eric Anholt <eric@anholt.net>
To: Stefan Schake <stschake@gmail.com>, dri-devel@lists.freedesktop.org
Cc: linux-rpi-kernel@lists.infradead.org,
	Stefan Schake <stschake@gmail.com>,
	David Airlie <airlied@linux.ie>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 1/2] drm/vc4: Account for interrupts in flight
Date: Mon, 13 Nov 2017 16:59:57 -0800	[thread overview]
Message-ID: <8760add69e.fsf@anholt.net> (raw)
In-Reply-To: <1510275907-993-2-git-send-email-stschake@gmail.com>

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Stefan Schake <stschake@gmail.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@gmail.com>
> Fixes: d5b1a78a772f ("drm/vc4: Add support for drawing 3D frames.")

Reviewed and applied this one.  Thanks!

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  reply	other threads:[~2017-11-14  0:59 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-10  1:05 [PATCH 0/2] drm/vc4: Correctly uninstall interrupts Stefan Schake
2017-11-10  1:05 ` Stefan Schake
2017-11-10  1:05 ` [PATCH 1/2] drm/vc4: Account for interrupts in flight Stefan Schake
2017-11-10  1:05   ` Stefan Schake
2017-11-14  0:59   ` Eric Anholt [this message]
2017-11-14  0:59     ` Eric Anholt
2017-11-10  1:05 ` [PATCH 2/2] drm/vc4: Ensure interrupts are disabled Stefan Schake
2017-11-10  1:05   ` Stefan Schake
2017-11-14  0:18   ` Eric Anholt
2017-11-14  0:18     ` Eric Anholt
2017-11-14 11:43     ` Stefan Schake
2017-11-14 19:44       ` Eric Anholt
2017-11-14 19:44         ` Eric Anholt
2017-11-14 23:18         ` Stefan Schake
2017-11-14 23:18           ` Stefan Schake

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