From: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
commit 9d50bff40e3e366886ec37299fc317edf84be0c9 upstream.
WRITE_ONCE() should happen at the original var, not on a local
copy of it.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 59eda6ce824e ("drm/i915/gt: Batch TLB invalidations")
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
Reviewed-by: Andi Shyti <andi.shyti@xxxxxxxxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
[added cc-stable while merging it]
Link: https://patchwork.freedesktop.org/patch/msgid/f9550e6bacea10131ff40dd8981b69eb9251cdcd.1659598090.git.mchehab@xxxxxxxxxx
(cherry picked from commit 3d037d99e61a1e7a3ae3d214146d88db349dd19f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/gt/intel_ppgtt.c | 2 +-
drivers/gpu/drm/i915/i915_vma.c | 6 +++---
drivers/gpu/drm/i915/i915_vma.h | 2 +-
3 files changed, 5 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/i915/gt/intel_ppgtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ppgtt.c
@@ -211,7 +211,7 @@ void ppgtt_unbind_vma(struct i915_addres
vm->clear_range(vm, vma_res->start, vma_res->vma_size);
if (vma_res->tlb)
- vma_invalidate_tlb(vm, *vma_res->tlb);
+ vma_invalidate_tlb(vm, vma_res->tlb);
}
static unsigned long pd_count(u64 size, int shift)
--- a/drivers/gpu/drm/i915/i915_vma.c
+++ b/drivers/gpu/drm/i915/i915_vma.c
@@ -1299,7 +1299,7 @@ err_unpin:
return err;
}
-void vma_invalidate_tlb(struct i915_address_space *vm, u32 tlb)
+void vma_invalidate_tlb(struct i915_address_space *vm, u32 *tlb)
{
/*
* Before we release the pages that were bound by this vma, we
@@ -1309,7 +1309,7 @@ void vma_invalidate_tlb(struct i915_addr
* the most recent TLB invalidation seqno, and if we have not yet
* flushed the TLBs upon release, perform a full invalidation.
*/
- WRITE_ONCE(tlb, intel_gt_next_invalidate_tlb_full(vm->gt));
+ WRITE_ONCE(*tlb, intel_gt_next_invalidate_tlb_full(vm->gt));
}
static void __vma_put_pages(struct i915_vma *vma, unsigned int count)
@@ -1957,7 +1957,7 @@ struct dma_fence *__i915_vma_evict(struc
dma_fence_put(unbind_fence);
unbind_fence = NULL;
}
- vma_invalidate_tlb(vma->vm, vma->obj->mm.tlb);
+ vma_invalidate_tlb(vma->vm, &vma->obj->mm.tlb);
}
/*
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -213,7 +213,7 @@ bool i915_vma_misplaced(const struct i91
u64 size, u64 alignment, u64 flags);
void __i915_vma_set_map_and_fenceable(struct i915_vma *vma);
void i915_vma_revoke_mmap(struct i915_vma *vma);
-void vma_invalidate_tlb(struct i915_address_space *vm, u32 tlb);
+void vma_invalidate_tlb(struct i915_address_space *vm, u32 *tlb);
struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async);
int __i915_vma_unbind(struct i915_vma *vma);
int __must_check i915_vma_unbind(struct i915_vma *vma);
