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OpenCloudOS-Kernel
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drm: fix crash with fops lock and fixup sarea/page size locking 

Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Dave Airlie 2007-02-18 17:13:39 +11:00
parent 54ba2f76e2
commit 11d9c2fd0a
1 changed files with 4 additions and 2 deletions
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6
drivers/char/drm/drm_fops.c
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@ -46,6 +46,7 @@ static int drm_setup(drm_device_t * dev)
drm_local_map_t *map;
int i;
int ret;
u32 sareapage;
if (dev->driver->firstopen) {
ret = dev->driver->firstopen(dev);
@ -56,7 +57,8 @@ static int drm_setup(drm_device_t * dev)
dev->magicfree.next = NULL;
/* prebuild the SAREA */
i = drm_addmap(dev, 0, SAREA_MAX, _DRM_SHM, _DRM_CONTAINS_LOCK, &map);
sareapage = max(SAREA_MAX, PAGE_SIZE);
i = drm_addmap(dev, 0, sareapage, _DRM_SHM, _DRM_CONTAINS_LOCK, &map);
if (i != 0)
return i;
@ -84,7 +86,7 @@ static int drm_setup(drm_device_t * dev)
INIT_LIST_HEAD(&dev->ctxlist->head);
dev->vmalist = NULL;
dev->sigdata.lock = dev->lock.hw_lock = NULL;
dev->sigdata.lock = NULL;
init_waitqueue_head(&dev->lock.lock_queue);
dev->queue_count = 0;
dev->queue_reserved = 0;