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FAILED: patch "[PATCH] drm/i915: pass a pointer for tlb seqno at" failed to apply to 4.14-stable tree

PATCH [email protected] 1 participant 1 message Aug 21, 2022

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Stable branch DRM drivers Intel i915
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The patch below does not apply to the 4.14-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 9d50bff40e3e366886ec37299fc317edf84be0c9 Mon Sep 17 00:00:00 2001
From: Mauro Carvalho Chehab <[email protected]>
Date: Thu, 4 Aug 2022 09:37:22 +0200
Subject: [PATCH] drm/i915: pass a pointer for tlb seqno at
vma_invalidate_tlb()

WRITE_ONCE() should happen at the original var, not on a local copy of it.

Cc [email protected]
Fixes 59eda6ce824e ("drm/i915/gt: Batch TLB invalidations")
Signed-off-by Mauro Carvalho Chehab <[email protected]>
Reviewed-by Andi Shyti <[email protected]>
Signed-off-by Rodrigo Vivi <[email protected]>
[added cc-stable while merging it]
Link https://patchwork.freedesktop.org/patch/msgid/f9550e6bacea10131ff40dd8981b69eb9251cdcd.1659598090.git.mchehab@kernel.org
(cherry picked from commit 3d037d99e61a1e7a3ae3d214146d88db349dd19f)
Signed-off-by Rodrigo Vivi <[email protected]>
drivers/gpu/drm/i915/gt/intel_ppgtt.c +1 -1
index 2da6c82a8bd2..6ee8d1127016 100644
@@ -211,7 +211,7 @@ void ppgtt_unbind_vma(struct i915_address_space *vm,
 
 	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)
drivers/gpu/drm/i915/i915_vma.c +3 -3
index 84a9ccbc5fc5..260371716490 100644
@@ -1308,7 +1308,7 @@ I915_SELFTEST_EXPORT int i915_vma_get_pages(struct i915_vma *vma)
 	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

@@ -1318,7 +1318,7 @@ void vma_invalidate_tlb(struct i915_address_space *vm, u32 tlb)
 	 * 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)

@@ -1971,7 +1971,7 @@ struct dma_fence *__i915_vma_evict(struct i915_vma *vma, bool async)
 			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);
 	}
 
 	/*
drivers/gpu/drm/i915/i915_vma.h +1 -1
index 5048eed536da..33a58f605d75 100644
@@ -213,7 +213,7 @@ bool i915_vma_misplaced(const struct i915_vma *vma,
 			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);