The patch below does not apply to the 3.18-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 c1f0a9c2d461a50c1a4c36d01b73c1325519b5fa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <[email protected]>
Date: Wed, 26 Nov 2014 16:29:33 +0100
Subject: [PATCH] drm/radeon: sync all BOs involved in a CS
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Not just the userspace relocs, otherwise we won't wait
for a swapped out page tables to be swapped in again.

Signed-off-by: Christian König <[email protected]>
Cc: [email protected]
Signed-off-by: Alex Deucher <[email protected]>

diff --git a/drivers/gpu/drm/radeon/radeon_cs.c 
b/drivers/gpu/drm/radeon/radeon_cs.c
index 75f22e5e999f..f5e0a696d2fe 100644
--- a/drivers/gpu/drm/radeon/radeon_cs.c
+++ b/drivers/gpu/drm/radeon/radeon_cs.c
@@ -251,22 +251,20 @@ static int radeon_cs_get_ring(struct radeon_cs_parser *p, 
u32 ring, s32 priority
 
 static int radeon_cs_sync_rings(struct radeon_cs_parser *p)
 {
-       int i, r = 0;
+       struct radeon_cs_reloc *reloc;
+       int r;
 
-       for (i = 0; i < p->nrelocs; i++) {
+       list_for_each_entry(reloc, &p->validated, tv.head) {
                struct reservation_object *resv;
 
-               if (!p->relocs[i].robj)
-                       continue;
-
-               resv = p->relocs[i].robj->tbo.resv;
+               resv = reloc->robj->tbo.resv;
                r = radeon_sync_resv(p->rdev, &p->ib.sync, resv,
-                                    p->relocs[i].tv.shared);
+                                    reloc->tv.shared);
 
                if (r)
-                       break;
+                       return r;
        }
-       return r;
+       return 0;
 }
 
 /* XXX: note that this is called from the legacy UMS CS ioctl as well */
@@ -505,9 +503,6 @@ static int radeon_bo_vm_update_pte(struct radeon_cs_parser 
*p,
        if (r)
                return r;
 
-       radeon_sync_resv(p->rdev, &p->ib.sync, vm->page_directory->tbo.resv,
-                        true);
-
        r = radeon_vm_clear_freed(rdev, vm);
        if (r)
                return r;

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