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drm/qxl: replace idr_init() by idr_init_base() 

idr_init() uses base 0 which is an invalid identifier for this driver.
The idr_alloc for this driver uses 1 as start value for ID range. The
new function idr_init_base allows IDR to set the ID lookup from base 1.
This avoids all lookups that otherwise starts from 0 since 0 is always
unused / available.

References: commit 6ce711f275 ("idr: Make 1-based IDRs more efficient")

Signed-off-by: Deepak R Varma <mh12gx2825@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20201105185016.GA71797@localhost
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Deepak R Varma 2020-11-06 00:20:16 +05:30 committed by Gerd Hoffmann
parent 44510939b1
commit 5d4c1edf0d
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/qxl/qxl_kms.c
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@ -231,11 +231,11 @@ int qxl_device_init(struct qxl_device *qdev,
goto cursor_ring_free;
}
idr_init(&qdev->release_idr);
idr_init_base(&qdev->release_idr, 1);
spin_lock_init(&qdev->release_idr_lock);
spin_lock_init(&qdev->release_lock);
idr_init(&qdev->surf_id_idr);
idr_init_base(&qdev->surf_id_idr, 1);
spin_lock_init(&qdev->surf_id_idr_lock);
mutex_init(&qdev->async_io_mutex);