From: Thomas Zimmermann <tzimmermann@suse.de>
To: Gerd Hoffmann <kraxel@redhat.com>, dri-devel@lists.freedesktop.org
Cc: David Airlie <airlied@linux.ie>,
open list <linux-kernel@vger.kernel.org>,
"open list:DRM DRIVER FOR QXL VIRTUAL GPU"
<virtualization@lists.linux-foundation.org>,
"open list:DRM DRIVER FOR QXL VIRTUAL GPU"
<spice-devel@lists.freedesktop.org>,
Dave Airlie <airlied@redhat.com>
Subject: Re: [PATCH 10/10] drm/qxl: add lock asserts to qxl_bo_kmap_locked + qxl_bo_kunmap_locked
Date: Tue, 16 Feb 2021 14:30:38 +0100 [thread overview]
Message-ID: <f61561a4-f6c7-9237-cd10-1c69016e6e45@suse.de> (raw)
In-Reply-To: <20210216113716.716996-11-kraxel@redhat.com>
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Hi
Am 16.02.21 um 12:37 schrieb Gerd Hoffmann:
> Try avoid re-introducing locking bugs.
>
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
IMHO this should eventually be done in the rsp TTM functions. But so
far, I'd expect this to break some drivers.
Best regards
Thomas
> ---
> drivers/gpu/drm/qxl/qxl_object.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/qxl/qxl_object.c b/drivers/gpu/drm/qxl/qxl_object.c
> index 22748b9566af..90d5e5b7f927 100644
> --- a/drivers/gpu/drm/qxl/qxl_object.c
> +++ b/drivers/gpu/drm/qxl/qxl_object.c
> @@ -162,6 +162,8 @@ int qxl_bo_kmap_locked(struct qxl_bo *bo, struct dma_buf_map *map)
> {
> int r;
>
> + dma_resv_assert_held(bo->tbo.base.resv);
> +
> if (bo->kptr) {
> bo->map_count++;
> goto out;
> @@ -236,6 +238,8 @@ void *qxl_bo_kmap_atomic_page(struct qxl_device *qdev,
>
> void qxl_bo_kunmap_locked(struct qxl_bo *bo)
> {
> + dma_resv_assert_held(bo->tbo.base.resv);
> +
> if (bo->kptr == NULL)
> return;
> bo->map_count--;
>
--
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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prev parent reply other threads:[~2021-02-16 13:31 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20210216113716.716996-1-kraxel@redhat.com>
2021-02-16 11:37 ` [PATCH 01/10] drm/qxl: properly handle device init failures Gerd Hoffmann
2021-02-16 13:08 ` Thomas Zimmermann
2021-02-16 11:37 ` [PATCH 02/10] drm/qxl: more fence wait rework Gerd Hoffmann
2021-02-16 11:37 ` [PATCH 03/10] drm/qxl: use ttm bo priorities Gerd Hoffmann
2021-02-16 11:37 ` [PATCH 04/10] drm/qxl: fix lockdep issue in qxl_alloc_release_reserved Gerd Hoffmann
2021-02-16 11:37 ` [PATCH 05/10] drm/qxl: rename qxl_bo_kmap -> qxl_bo_kmap_locked Gerd Hoffmann
2021-02-16 13:14 ` Thomas Zimmermann
2021-02-16 11:37 ` [PATCH 06/10] drm/qxl: add qxl_bo_kmap/qxl_bo_kunmap Gerd Hoffmann
2021-02-16 13:17 ` Thomas Zimmermann
2021-02-16 11:37 ` [PATCH 07/10] drm/qxl: fix prime kmap Gerd Hoffmann
2021-02-16 13:16 ` Thomas Zimmermann
2021-02-16 11:37 ` [PATCH 08/10] drm/qxl: fix monitors object kmap Gerd Hoffmann
2021-02-16 13:18 ` Thomas Zimmermann
2021-02-16 11:37 ` [PATCH 09/10] drm/qxl: map/unmap framebuffers in prepare_fb+cleanup_fb callbacks Gerd Hoffmann
2021-02-16 13:27 ` Thomas Zimmermann
2021-02-16 13:46 ` Thomas Zimmermann
2021-02-17 10:02 ` Gerd Hoffmann
2021-02-17 10:23 ` Thomas Zimmermann
2021-02-16 11:37 ` [PATCH 10/10] drm/qxl: add lock asserts to qxl_bo_kmap_locked + qxl_bo_kunmap_locked Gerd Hoffmann
2021-02-16 13:30 ` Thomas Zimmermann [this message]
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