async_tx: avoid the async xor_zero_sum path when src_cnt > device->max_xor

[h-e-n] / crypto / async_tx / async_xor.c

diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
index 7a9db35..1c445c7 100644 (file)
--- a/crypto/async_tx/async_xor.c
+++ b/crypto/async_tx/async_xor.c
@@ -271,7 +271,7 @@ async_xor_zero_sum(struct page *dest, struct page **src_list,
 
        BUG_ON(src_cnt <= 1);
 
-       if (device) {
+       if (device && src_cnt <= device->max_xor) {
                dma_addr_t *dma_src = (dma_addr_t *) src_list;
                unsigned long dma_prep_flags = cb_fn ? DMA_PREP_INTERRUPT : 0;
                int i;