From cc37d41ac9f556cf1e8f1f0e993a56b5fde4717f Mon Sep 17 00:00:00 2001
From: Ralph Campbell <rcampbell@nvidia.com>
Date: Tue, 3 Mar 2020 16:13:38 -0800
Subject: drm/nouveau/svm: remove useless SVM range check
Git-commit: bc7b188023e77d69d8dd584c51e62f0e99d9e2a2
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
When nouveau processes GPU faults, it checks to see if the fault address
falls within the "unmanaged" range which is reserved for fixed allocations
instead of addresses chosen by the core mm code. If start is greater than
or equal to svmm->unmanaged.limit, then limit will also be greater than
svmm->unmanaged.limit which is greater than svmm->unmanaged.start and the
start = max_t(u64, start, svmm->unmanaged.limit) will change nothing.
Just remove the useless lines of code.
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/nouveau/nouveau_svm.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c
index c567526b75b8..8dfa5cb74826 100644
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -663,9 +663,6 @@ nouveau_svm_fault(struct nvif_notify *notify)
limit = start + (ARRAY_SIZE(args.phys) << PAGE_SHIFT);
if (start < svmm->unmanaged.limit)
limit = min_t(u64, limit, svmm->unmanaged.start);
- else
- if (limit > svmm->unmanaged.start)
- start = max_t(u64, start, svmm->unmanaged.limit);
SVMM_DBG(svmm, "wndw %016llx-%016llx", start, limit);
mm = svmm->notifier.mm;
--
2.28.0