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MFC r196464

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Clean up the locking in drm_alloc_resource()
This commit is contained in:
Robert Noland 2009-10-30 16:06:32 +00:00
parent 713444a957
commit e7d8e24d0a
1 changed files with 15 additions and 7 deletions
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22
sys/dev/drm/drm_bufs.c
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@ -45,27 +45,35 @@ __FBSDID("$FreeBSD$");
*/
static int drm_alloc_resource(struct drm_device *dev, int resource)
{
struct resource *res;
int rid;
DRM_SPINLOCK_ASSERT(&dev->dev_lock);
if (resource >= DRM_MAX_PCI_RESOURCE) {
DRM_ERROR("Resource %d too large\n", resource);
return 1;
}
DRM_UNLOCK();
if (dev->pcir[resource] != NULL) {
DRM_LOCK();
return 0;
}
dev->pcirid[resource] = PCIR_BAR(resource);
dev->pcir[resource] = bus_alloc_resource_any(dev->device,
SYS_RES_MEMORY, &dev->pcirid[resource], RF_SHAREABLE);
DRM_UNLOCK();
rid = PCIR_BAR(resource);
res = bus_alloc_resource_any(dev->device, SYS_RES_MEMORY, &rid,
RF_SHAREABLE);
DRM_LOCK();
if (dev->pcir[resource] == NULL) {
if (res == NULL) {
DRM_ERROR("Couldn't find resource 0x%x\n", resource);
return 1;
}
if (dev->pcir[resource] == NULL) {
dev->pcirid[resource] = rid;
dev->pcir[resource] = res;
}
return 0;
}