linux-kernel - [PATCH v2] crypto: hisilicon/hpre - don't use GFP

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Date:   Tue, 19 Jul 2022 12:23:23 +0800
From:   Zhengchao Shao <shaozhengchao@...wei.com>
To:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <liulongfang@...wei.com>, <herbert@...dor.apana.org.au>,
        <davem@...emloft.net>
CC:     <xuzaibo@...wei.com>, <weiyongjun1@...wei.com>,
        <yuehaibing@...wei.com>, <shaozhengchao@...wei.com>
Subject: [PATCH v2] crypto: hisilicon/hpre - don't use GFP_KERNEL to alloc mem during softirq

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@...wei.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