[PATCH] crypto: sun4i-ss: use spin_lock_irq{save|restore}
From: LABBE Corentin <clabbe.montjoie@gmail.com>
Date: 2016-03-22 16:05:23
Also in:
linux-arm-kernel, lkml, stable
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
The current sun4i-ss driver is subject to 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 they irq counterparts. Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com> Cc: stable <redacted> --- drivers/crypto/sunxi-ss/sun4i-ss-cipher.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c b/drivers/crypto/sunxi-ss/sun4i-ss-cipher.c
index a19ee12..e72fea73 100644
--- 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; }
--
2.7.3