From: Dave Airlie <airl...@redhat.com>

dEQP-VK.sparse_resources.image_rebind.2d_array.r64i.128_128_8
was causing a remap operation like the below.

op_remap: prev: 0000003fffed0000 00000000000f0000 00000000a5abd18a 
0000000000000000
op_remap: next:
op_remap: unmap: 0000003fffed0000 0000000000100000 0
op_map: map: 0000003ffffc0000 0000000000010000 000000005b1ba33c 00000000000e0000

This was resulting in an unmap operation from 0x3fffed0000+0xf0000, 0x100000
which was corrupting the pagetables and oopsing the kernel.

Fixes the prev + unmap range calcs to use start/end and map back to addr/range.

Signed-off-by: Dave Airlie <airl...@redhat.com>
Fixes: b88baab82871 ("drm/nouveau: implement new VM_BIND uAPI")
Cc: Danilo Krummrich <d...@redhat.com>
---
 drivers/gpu/drm/nouveau/nouveau_uvmm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_uvmm.c 
b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
index 9675ef25b16d..87bce1a9d073 100644
--- a/drivers/gpu/drm/nouveau/nouveau_uvmm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_uvmm.c
@@ -813,15 +813,15 @@ op_remap(struct drm_gpuva_op_remap *r,
        struct drm_gpuva_op_unmap *u = r->unmap;
        struct nouveau_uvma *uvma = uvma_from_va(u->va);
        u64 addr = uvma->va.va.addr;
-       u64 range = uvma->va.va.range;
+       u64 end = uvma->va.va.addr + uvma->va.va.range;
 
        if (r->prev)
                addr = r->prev->va.addr + r->prev->va.range;
 
        if (r->next)
-               range = r->next->va.addr - addr;
+               end = r->next->va.addr;
 
-       op_unmap_range(u, addr, range);
+       op_unmap_range(u, addr, end - addr);
 }
 
 static int
-- 
2.43.2

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