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

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: 6298e94821 ("crypto: sunxi-ss - Add Allwinner Security System crypto accelerator")
Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Corentin LABBE 2016-03-23 16:11:24 +01:00 committed by Herbert Xu
parent 738f98233b
commit bdb6cf9f6f
1 changed files with 6 additions and 4 deletions
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10
drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
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@ -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 @@ static int sun4i_ss_opti_poll(struct ablkcipher_request *areq)
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);
@ -307,7 +309,7 @@ static int sun4i_ss_cipher_poll(struct ablkcipher_request *areq)
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;
}