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authorChristian König <christian.koenig@amd.com>2019-08-05 11:49:20 +0200
committerChristian König <christian.koenig@amd.com>2019-08-07 13:13:11 +0200
commitb8c036dfc66f774624ba7b9e7414fd90a61e0527 (patch)
tree569c5732093526b63385d8530fa0456345f9eaf4 /drivers/dma-buf
parent4c2488cfaa997e396aeb9d6496db94c25b97c671 (diff)
downloadlinux-b8c036dfc66f774624ba7b9e7414fd90a61e0527.tar.bz2
dma-buf: simplify reservation_object_get_fences_rcu a bit
We can add the exclusive fence to the list after making sure we got a consistent state. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/322034/?series=64786&rev=1
Diffstat (limited to 'drivers/dma-buf')
-rw-r--r--drivers/dma-buf/reservation.c15
1 files changed, 5 insertions, 10 deletions
diff --git a/drivers/dma-buf/reservation.c b/drivers/dma-buf/reservation.c
index c0ba05936ab6..ad6775b32a73 100644
--- a/drivers/dma-buf/reservation.c
+++ b/drivers/dma-buf/reservation.c
@@ -459,13 +459,6 @@ int reservation_object_get_fences_rcu(struct reservation_object *obj,
if (!dma_fence_get_rcu(shared[i]))
break;
}
-
- if (!pfence_excl && fence_excl) {
- shared[i] = fence_excl;
- fence_excl = NULL;
- ++i;
- ++shared_count;
- }
}
if (i != shared_count || read_seqcount_retry(&obj->seq, seq)) {
@@ -480,6 +473,11 @@ unlock:
rcu_read_unlock();
} while (ret);
+ if (pfence_excl)
+ *pfence_excl = fence_excl;
+ else if (fence_excl)
+ shared[++shared_count] = fence_excl;
+
if (!shared_count) {
kfree(shared);
shared = NULL;
@@ -487,9 +485,6 @@ unlock:
*pshared_count = shared_count;
*pshared = shared;
- if (pfence_excl)
- *pfence_excl = fence_excl;
-
return ret;
}
EXPORT_SYMBOL_GPL(reservation_object_get_fences_rcu);