From: Boris Brezillon <boris.brezillon@collabora.com>
To: Steven Price <steven.price@arm.com>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>,
David Airlie <airlied@linux.ie>,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Subject: Re: [PATCH] drm/panfrost: Fix module unload
Date: Tue, 3 Nov 2020 09:45:02 +0100 [thread overview]
Message-ID: <20201103094502.70de59c9@collabora.com> (raw)
In-Reply-To: <20201030145833.29006-1-steven.price@arm.com>
On Fri, 30 Oct 2020 14:58:33 +0000
Steven Price <steven.price@arm.com> wrote:
> When unloading the call to pm_runtime_put_sync_suspend() will attempt to
> turn the GPU cores off, however panfrost_device_fini() will have turned
> the clocks off. This leads to the hardware locking up.
>
> Instead don't call pm_runtime_put_sync_suspend() and instead simply mark
> the device as suspended using pm_runtime_set_suspended(). And also
> include this on the error path in panfrost_probe().
>
> Fixes: aebe8c22a912 ("drm/panfrost: Fix possible suspend in panfrost_remove")
> Signed-off-by: Steven Price <steven.price@arm.com>
Queued to drm-misc-fixes.
Thanks,
Boris
> ---
> drivers/gpu/drm/panfrost/panfrost_drv.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 23513869500c..0ac8ad18fdc6 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -627,6 +627,7 @@ static int panfrost_probe(struct platform_device *pdev)
> err_out1:
> pm_runtime_disable(pfdev->dev);
> panfrost_device_fini(pfdev);
> + pm_runtime_set_suspended(pfdev->dev);
> err_out0:
> drm_dev_put(ddev);
> return err;
> @@ -641,9 +642,9 @@ static int panfrost_remove(struct platform_device *pdev)
> panfrost_gem_shrinker_cleanup(ddev);
>
> pm_runtime_get_sync(pfdev->dev);
> - panfrost_device_fini(pfdev);
> - pm_runtime_put_sync_suspend(pfdev->dev);
> pm_runtime_disable(pfdev->dev);
> + panfrost_device_fini(pfdev);
> + pm_runtime_set_suspended(pfdev->dev);
>
> drm_dev_put(ddev);
> return 0;
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WARNING: multiple messages have this Message-ID (diff)
From: Boris Brezillon <boris.brezillon@collabora.com>
To: Steven Price <steven.price@arm.com>
Cc: Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
Rob Herring <robh@kernel.org>,
Tomeu Vizoso <tomeu.vizoso@collabora.com>,
Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] drm/panfrost: Fix module unload
Date: Tue, 3 Nov 2020 09:45:02 +0100 [thread overview]
Message-ID: <20201103094502.70de59c9@collabora.com> (raw)
In-Reply-To: <20201030145833.29006-1-steven.price@arm.com>
On Fri, 30 Oct 2020 14:58:33 +0000
Steven Price <steven.price@arm.com> wrote:
> When unloading the call to pm_runtime_put_sync_suspend() will attempt to
> turn the GPU cores off, however panfrost_device_fini() will have turned
> the clocks off. This leads to the hardware locking up.
>
> Instead don't call pm_runtime_put_sync_suspend() and instead simply mark
> the device as suspended using pm_runtime_set_suspended(). And also
> include this on the error path in panfrost_probe().
>
> Fixes: aebe8c22a912 ("drm/panfrost: Fix possible suspend in panfrost_remove")
> Signed-off-by: Steven Price <steven.price@arm.com>
Queued to drm-misc-fixes.
Thanks,
Boris
> ---
> drivers/gpu/drm/panfrost/panfrost_drv.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
> index 23513869500c..0ac8ad18fdc6 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_drv.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
> @@ -627,6 +627,7 @@ static int panfrost_probe(struct platform_device *pdev)
> err_out1:
> pm_runtime_disable(pfdev->dev);
> panfrost_device_fini(pfdev);
> + pm_runtime_set_suspended(pfdev->dev);
> err_out0:
> drm_dev_put(ddev);
> return err;
> @@ -641,9 +642,9 @@ static int panfrost_remove(struct platform_device *pdev)
> panfrost_gem_shrinker_cleanup(ddev);
>
> pm_runtime_get_sync(pfdev->dev);
> - panfrost_device_fini(pfdev);
> - pm_runtime_put_sync_suspend(pfdev->dev);
> pm_runtime_disable(pfdev->dev);
> + panfrost_device_fini(pfdev);
> + pm_runtime_set_suspended(pfdev->dev);
>
> drm_dev_put(ddev);
> return 0;
next prev parent reply other threads:[~2020-11-03 8:45 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 14:58 [PATCH] drm/panfrost: Fix module unload Steven Price
2020-10-30 14:58 ` Steven Price
2020-11-03 8:29 ` Tomeu Vizoso
2020-11-03 8:45 ` Boris Brezillon [this message]
2020-11-03 8:45 ` Boris Brezillon
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