openwrt/target/linux/apm821xx/patches-4.14/022-0001-crypto-Use-zeroing-memory-allocator-instead-of-alloc.patch

From 75d68369b544acc5d14c18a827654dfff248d09d Mon Sep 17 00:00:00 2001
From: Himanshu Jha <[email protected]>
Date: Sun, 31 Dec 2017 17:54:23 +0530
Subject: [PATCH 1/8] crypto: Use zeroing memory allocator instead of
 allocator/memset

Use dma_zalloc_coherent for allocating zeroed
memory and remove unnecessary memset function.

Done using Coccinelle.
Generated-by: scripts/coccinelle/api/alloc/kzalloc-simple.cocci
0-day tested with no failures.

Signed-off-by: Himanshu Jha <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
---
 drivers/crypto/amcc/crypto4xx_core.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

--- a/drivers/crypto/amcc/crypto4xx_core.c
+++ b/drivers/crypto/amcc/crypto4xx_core.c
@@ -282,14 +282,12 @@ static u32 crypto4xx_put_pd_to_pdr(struc
  */
 static u32 crypto4xx_build_gdr(struct crypto4xx_device *dev)
 {
-	dev->gdr = dma_alloc_coherent(dev->core_dev->device,
-				      sizeof(struct ce_gd) * PPC4XX_NUM_GD,
-				      &dev->gdr_pa, GFP_ATOMIC);
+	dev->gdr = dma_zalloc_coherent(dev->core_dev->device,
+				       sizeof(struct ce_gd) * PPC4XX_NUM_GD,
+				       &dev->gdr_pa, GFP_ATOMIC);
 	if (!dev->gdr)
 		return -ENOMEM;
 
-	memset(dev->gdr, 0, sizeof(struct ce_gd) * PPC4XX_NUM_GD);
-
 	return 0;
 }