linux-kernel - [PATCH 1/5] crypto: sun8i-ss: call finalize with bh disabled

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Message-Id: <20220221120833.2618733-2-clabbe@baylibre.com>
Date:   Mon, 21 Feb 2022 12:08:29 +0000
From:   Corentin Labbe <clabbe@...libre.com>
To:     herbert@...dor.apana.org.au, jernej.skrabec@...il.com,
        linus.walleij@...aro.org, narmstrong@...libre.com,
        ulli.kroll@...glemail.com, wens@...e.org
Cc:     linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...ts.linux.dev,
        Corentin Labbe <clabbe@...libre.com>
Subject: [PATCH 1/5] crypto: sun8i-ss: call finalize with bh disabled

Doing ipsec produces a spinlock recursion warning.
This is due to not disabling BH during crypto completion function.

Fixes: f08fcced6d00 ("crypto: allwinner - Add sun8i-ss cryptographic offloader")
Signed-off-by: Corentin Labbe <clabbe@...libre.com>
---
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c | 3 +++
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c   | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index 9ef1c85c4aaa..554e400d41ca 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
@@ -11,6 +11,7 @@
  * You could find a link for the datasheet in Documentation/arm/sunxi.rst
  */
 
+#include <linux/bottom_half.h>
 #include <linux/crypto.h>
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
@@ -274,7 +275,9 @@ static int sun8i_ss_handle_cipher_request(struct crypto_engine *engine, void *ar
 	struct skcipher_request *breq = container_of(areq, struct skcipher_request, base);
 
 	err = sun8i_ss_cipher(breq);
+	local_bh_disable();
 	crypto_finalize_skcipher_request(engine, breq, err);
+	local_bh_enable();
 
 	return 0;
 }
diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
index d8c333fe5eb2..0c2ca296bede 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
@@ -9,6 +9,7 @@
  *
  * You could find the datasheet in Documentation/arm/sunxi.rst
  */
+#include <linux/bottom_half.h>
 #include <linux/dma-mapping.h>
 #include <linux/pm_runtime.h>
 #include <linux/scatterlist.h>
@@ -633,6 +634,8 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
 
 	memcpy(areq->result, result, algt->alg.hash.halg.digestsize);
 theend:
+	local_bh_disable();
 	crypto_finalize_hash_request(engine, breq, err);
+	local_bh_enable();
 	return 0;
 }
-- 
2.34.1