[PATCH] ath10k: use dma_zalloc_coherent instead of allocator/memset

[YueHaibing]

Use dma_zalloc_coherent instead of dma_alloc_coherent
followed by memset 0.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/net/wireless/ath/ath10k/wmi.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/wireless/ath/ath10k/wmi.c 
b/drivers/net/wireless/ath/ath10k/wmi.c
index f97ab79..72db3bd 100644
--- a/drivers/net/wireless/ath/ath10k/wmi.c
+++ b/drivers/net/wireless/ath/ath10k/wmi.c
@@ -5018,13 +5018,11 @@ static int ath10k_wmi_alloc_chunk(struct ath10k *ar, 
u32 req_id,
        void *vaddr;
 
        pool_size = num_units * round_up(unit_len, 4);
-       vaddr = dma_alloc_coherent(ar->dev, pool_size, &paddr, GFP_KERNEL);
+       vaddr = dma_zalloc_coherent(ar->dev, pool_size, &paddr, GFP_KERNEL);
 
        if (!vaddr)
                return -ENOMEM;
 
-       memset(vaddr, 0, pool_size);
-
        ar->wmi.mem_chunks[idx].vaddr = vaddr;
        ar->wmi.mem_chunks[idx].paddr = paddr;
        ar->wmi.mem_chunks[idx].len = pool_size;
-- 
2.7.0