linux-kernel - Re: [PATCH 01/10] drm/qxl: properly handle device init failures

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Message-ID: <c9451a9a-b8b4-9393-4397-624df4eba3ff@suse.de>
Date:   Tue, 16 Feb 2021 14:08:25 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Gerd Hoffmann <kraxel@...hat.com>, dri-devel@...ts.freedesktop.org
Cc:     David Airlie <airlied@...ux.ie>, Tong Zhang <ztong0001@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        "open list:DRM DRIVER FOR QXL VIRTUAL GPU" 
        <virtualization@...ts.linux-foundation.org>,
        "open list:DRM DRIVER FOR QXL VIRTUAL GPU" 
        <spice-devel@...ts.freedesktop.org>,
        Dave Airlie <airlied@...hat.com>
Subject: Re: [PATCH 01/10] drm/qxl: properly handle device init failures



Am 16.02.21 um 12:37 schrieb Gerd Hoffmann:
> Specifically do not try release resources which where
> not allocated in the first place.

I still think this should eventually be resolved by using managed code. 
But for now

Acked-by: Thomas Zimmermann <tzimmermann@...e.de>

> 
> Cc: Tong Zhang <ztong0001@...il.com>
> Tested-by: Tong Zhang <ztong0001@...il.com>
> Signed-off-by: Gerd Hoffmann <kraxel@...hat.com>
> ---
>   drivers/gpu/drm/qxl/qxl_display.c | 3 +++
>   drivers/gpu/drm/qxl/qxl_kms.c     | 4 ++++
>   2 files changed, 7 insertions(+)
> 
> diff --git a/drivers/gpu/drm/qxl/qxl_display.c b/drivers/gpu/drm/qxl/qxl_display.c
> index c326412136c5..ec50d2cfd4e1 100644
> --- a/drivers/gpu/drm/qxl/qxl_display.c
> +++ b/drivers/gpu/drm/qxl/qxl_display.c
> @@ -1183,6 +1183,9 @@ int qxl_destroy_monitors_object(struct qxl_device *qdev)
>   {
>   	int ret;
>   
> +	if (!qdev->monitors_config_bo)
> +		return 0;
> +
>   	qdev->monitors_config = NULL;
>   	qdev->ram_header->monitors_config = 0;
>   
> diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
> index 66d74aaaee06..4dc5ad13f12c 100644
> --- a/drivers/gpu/drm/qxl/qxl_kms.c
> +++ b/drivers/gpu/drm/qxl/qxl_kms.c
> @@ -288,6 +288,10 @@ void qxl_device_fini(struct qxl_device *qdev)
>   {
>   	int cur_idx;
>   
> +	/* check if qxl_device_init() was successful (gc_work is initialized last) */
> +	if (!qdev->gc_work.func)
> +		return;
> +
>   	for (cur_idx = 0; cur_idx < 3; cur_idx++) {
>   		if (!qdev->current_release_bo[cur_idx])
>   			continue;
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer



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