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| author | Thomas Hellstrom <thellstrom@vmware.com> | 2019-05-07 12:10:10 +0300 |
|---|---|---|
| committer | Thomas Hellstrom <thellstrom@vmware.com> | 2019-05-21 11:23:09 +0300 |
| commit | 8407f8a1d940fe28c4243ad4f0cb6a44dcee88f6 (patch) | |
| tree | 42336eba45dcdb56d02d59b13848ed46be9070ae /drivers/gpu/drm/vmwgfx | |
| parent | 63cb44441826e842b7285575b96db631cc9f2505 (diff) | |
| download | linux-8407f8a1d940fe28c4243ad4f0cb6a44dcee88f6.tar.xz | |
drm/vmwgfx: Fix user space handle equal to zero
User-space handles equal to zero are interpreted as uninitialized or
illegal by some drm systems (most notably kms). This means that a
dumb buffer or surface with a zero user-space handle can never be
used as a kms frame-buffer.
Cc: <stable@vger.kernel.org>
Fixes: c7eae62666ad ("drm/vmwgfx: Make the object handles idr-generated")
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Deepak Rawat <drawat@vmware.com>
Diffstat (limited to 'drivers/gpu/drm/vmwgfx')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/ttm_object.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/vmwgfx/ttm_object.c b/drivers/gpu/drm/vmwgfx/ttm_object.c index 36990b80e790..16077785ad47 100644 --- a/drivers/gpu/drm/vmwgfx/ttm_object.c +++ b/drivers/gpu/drm/vmwgfx/ttm_object.c @@ -174,7 +174,7 @@ int ttm_base_object_init(struct ttm_object_file *tfile, kref_init(&base->refcount); idr_preload(GFP_KERNEL); spin_lock(&tdev->object_lock); - ret = idr_alloc(&tdev->idr, base, 0, 0, GFP_NOWAIT); + ret = idr_alloc(&tdev->idr, base, 1, 0, GFP_NOWAIT); spin_unlock(&tdev->object_lock); idr_preload_end(); if (ret < 0) |