This is a note to let you know that I've just added the patch titled
drm/radeon: fix lockup when BOs aren't part of the VM on release
to the 4.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-radeon-fix-lockup-when-bos-aren-t-part-of-the-vm-on-release.patch
and it can be found in the queue-4.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 26d4d129b6042197b4cbc8341c0618f99231af2f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@xxxxxxx>
Date: Mon, 27 Apr 2015 17:04:34 +0200
Subject: drm/radeon: fix lockup when BOs aren't part of the VM on release
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From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@xxxxxxx>
commit 26d4d129b6042197b4cbc8341c0618f99231af2f upstream.
If we unmap BOs before releasing them them the intervall tree locks
up because we try to remove an entry not inside the tree.
Based on a patch from Michel Dänzer.
Signed-off-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_vm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/radeon/radeon_vm.c
+++ b/drivers/gpu/drm/radeon/radeon_vm.c
@@ -1107,7 +1107,8 @@ void radeon_vm_bo_rmv(struct radeon_devi
list_del(&bo_va->bo_list);
mutex_lock(&vm->mutex);
- interval_tree_remove(&bo_va->it, &vm->va);
+ if (bo_va->it.start || bo_va->it.last)
+ interval_tree_remove(&bo_va->it, &vm->va);
spin_lock(&vm->status_lock);
list_del(&bo_va->vm_status);
Patches currently in stable-queue which might be from christian.koenig@xxxxxxx are
queue-4.0/drm-radeon-fix-lockup-when-bos-aren-t-part-of-the-vm-on-release.patch
queue-4.0/drm-radeon-reset-bos-address-after-clearing-it.patch
queue-4.0/drm-radeon-check-new-address-before-removing-old-one.patch
queue-4.0/drm-radeon-use-drm_calloc_ab-for-cs-relocs.patch
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