crypto: sun4i-ss - Replace spinlock_bh by spin_lock_irq{save|restore}

commit bdb6cf9f6fe6d9af905ea34b7c4bb78ea601329e upstream.

The current sun4i-ss driver could generate data corruption when ciphering/deciphering.
It occurs randomly on end of handled data.
No root cause have been found and the only way to remove it is to replace
all spin_lock_bh by their irq counterparts.

Fixes: 6298e948215f ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator")
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
index a19ee12..e72fea7 100644 (file)
--- a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
+++ b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
@@ -35,6 +35,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
        unsigned int todo;
        struct sg_mapping_iter mi, mo;
        unsigned int oi, oo; /* offset for in and out */
+       unsigned long flags;
 
        if (areq->nbytes == 0)
                return 0;
@@ -49,7 +50,7 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
                return -EINVAL;
        }
 
-       spin_lock_bh(&ss->slock);
+       spin_lock_irqsave(&ss->slock, flags);
 
        for (i = 0; i < op->keylen; i += 4)
                writel(*(op->key + i / 4), ss->base + SS_KEY0 + i);
@@ -117,7 +118,7 @@ release_ss:
        sg_miter_stop(&mi);
        sg_miter_stop(&mo);
        writel(0, ss->base + SS_CTL);
-       spin_unlock_bh(&ss->slock);
+       spin_unlock_irqrestore(&ss->slock, flags);
        return err;
 }
 
@@ -149,6 +150,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
        unsigned int ob = 0;    /* offset in buf */
        unsigned int obo = 0;   /* offset in bufo*/
        unsigned int obl = 0;   /* length of data in bufo */
+       unsigned long flags;
 
        if (areq->nbytes == 0)
                return 0;
@@ -181,7 +183,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
        if (no_chunk == 1)
                return sun4i_ss_opti_poll(areq);
 
-       spin_lock_bh(&ss->slock);
+       spin_lock_irqsave(&ss->slock, flags);
 
        for (i = 0; i < op->keylen; i += 4)
                writel(*(op->key + i / 4), ss->base + SS_KEY0 + i);
@@ -308,7 +310,7 @@ release_ss:
        sg_miter_stop(&mi);
        sg_miter_stop(&mo);
        writel(0, ss->base + SS_CTL);
-       spin_unlock_bh(&ss->slock);
+       spin_unlock_irqrestore(&ss->slock, flags);
 
        return err;
 }