Received-SPF: pass (google.com: domain of linux-crypto-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Zhengchao Shao <shaozhengchao@huawei.com>
To:     <linux-crypto@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <liulongfang@huawei.com>, <herbert@gondor.apana.org.au>,
        <davem@davemloft.net>
CC:     <xuzaibo@huawei.com>, <weiyongjun1@huawei.com>,
        <yuehaibing@huawei.com>, <shaozhengchao@huawei.com>
Subject: [PATCH v2] crypto: hisilicon/hpre - don't use GFP_KERNEL to alloc mem during softirq
Date:   Tue, 19 Jul 2022 12:23:23 +0800
Message-ID: <20220719042323.260146-1-shaozhengchao@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

The hpre encryption driver may be used to encrypt and decrypt packets
during the rx softirq, it is not allowed to use GFP_KERNEL.

Fixes: c8b4b477079d ("crypto: hisilicon - add HiSilicon HPRE accelerator")
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
---
This patch is not tested, compiled only.
---
 drivers/crypto/hisilicon/hpre/hpre_crypto.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
index 97d54c1465c2..3ba6f15deafc 100644
--- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c
+++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c
@@ -252,7 +252,7 @@ static int hpre_prepare_dma_buf(struct hpre_asym_request *hpre_req,
 	if (unlikely(shift < 0))
 		return -EINVAL;
 
-	ptr = dma_alloc_coherent(dev, ctx->key_sz, tmp, GFP_KERNEL);
+	ptr = dma_alloc_coherent(dev, ctx->key_sz, tmp, GFP_ATOMIC);
 	if (unlikely(!ptr))
 		return -ENOMEM;
 
-- 
2.17.1