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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
This commit is contained in:
Christian König 2019-08-05 11:49:20 +02:00
parent 4c2488cfaa
commit b8c036dfc6
1 changed files with 5 additions and 10 deletions
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15
drivers/dma-buf/reservation.c
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@ -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);