nouveau: remove the block parameter to nouveau_range_fault

The parameter is always false, so remove it as well as the -EAGAIN
handling that can only happen for the non-blocking case.

Link: https://lore.kernel.org/r/20190724065258.16603-4-hch@lst.deTested-by: NRalph Campbell <rcampbell@nvidia.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>

drivers/gpu/drm/nouveau/nouveau_svm.c

@@ -485,8 +485,7 @@ nouveau_range_done(struct hmm_range *range)
 }
 
 static int
-nouveau_range_fault(struct hmm_mirror *mirror, struct hmm_range *range,
-		    bool block)
+nouveau_range_fault(struct hmm_mirror *mirror, struct hmm_range *range)
 {
 	long ret;
 
@@ -504,13 +503,12 @@ nouveau_range_fault(struct hmm_mirror *mirror, struct hmm_range *range,
 		return -EAGAIN;
 	}
 
-	ret = hmm_range_fault(range, block);
+	ret = hmm_range_fault(range, true);
 	if (ret <= 0) {
 		if (ret == -EBUSY || !ret) {
 			up_read(&range->vma->vm_mm->mmap_sem);
 			ret = -EBUSY;
-		} else if (ret == -EAGAIN)
-			ret = -EBUSY;
+		}
 		hmm_range_unregister(range);
 		return ret;
 	}
@@ -691,7 +689,7 @@ nouveau_svm_fault(struct nvif_notify *notify)
 		range.values = nouveau_svm_pfn_values;
 		range.pfn_shift = NVIF_VMM_PFNMAP_V0_ADDR_SHIFT;
 again:
-		ret = nouveau_range_fault(&svmm->mirror, &range, true);
+		ret = nouveau_range_fault(&svmm->mirror, &range);
 		if (ret == 0) {
 			mutex_lock(&svmm->mutex);
 			if (!nouveau_range_done(&range)) {