X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=crypto%2Fdigest.c;h=8871dec8cae7484a1fe34e68966563ad1d6032b9;hb=11f24fbdf511cf588c3a18e3208ee02d85db0020;hp=8f4593268ce0bf5c5ef2e9e47d8ab72789adb842;hpb=1c1afa3c053d4ccdf44e5a4e159005cdfd48bfc6;p=linux-2.6-omap-h63xx.git

diff --git a/crypto/digest.c b/crypto/digest.c
index 8f4593268ce..8871dec8cae 100644
--- a/crypto/digest.c
+++ b/crypto/digest.c
@@ -14,7 +14,9 @@
 
 #include <linux/mm.h>
 #include <linux/errno.h>
+#include <linux/hardirq.h>
 #include <linux/highmem.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/scatterlist.h>
 
@@ -29,8 +31,8 @@ static int init(struct hash_desc *desc)
 	return 0;
 }
 
-static int update(struct hash_desc *desc,
-		  struct scatterlist *sg, unsigned int nbytes)
+static int update2(struct hash_desc *desc,
+		   struct scatterlist *sg, unsigned int nbytes)
 {
 	struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
 	unsigned int alignmask = crypto_tfm_alg_alignmask(tfm);
@@ -39,7 +41,7 @@ static int update(struct hash_desc *desc,
 		return 0;
 
 	for (;;) {
-		struct page *pg = sg->page;
+		struct page *pg = sg_page(sg);
 		unsigned int offset = sg->offset;
 		unsigned int l = sg->length;
 
@@ -75,12 +77,20 @@ static int update(struct hash_desc *desc,
 
 		if (!nbytes)
 			break;
-		sg = sg_next(sg);
+		sg = scatterwalk_sg_next(sg);
 	}
 
 	return 0;
 }
 
+static int update(struct hash_desc *desc,
+		  struct scatterlist *sg, unsigned int nbytes)
+{
+	if (WARN_ON_ONCE(in_irq()))
+		return -EDEADLK;
+	return update2(desc, sg, nbytes);
+}
+
 static int final(struct hash_desc *desc, u8 *out)
 {
 	struct crypto_tfm *tfm = crypto_hash_tfm(desc->tfm);
@@ -118,16 +128,14 @@ static int setkey(struct crypto_hash *hash, const u8 *key, unsigned int keylen)
 static int digest(struct hash_desc *desc,
 		  struct scatterlist *sg, unsigned int nbytes, u8 *out)
 {
+	if (WARN_ON_ONCE(in_irq()))
+		return -EDEADLK;
+
 	init(desc);
-	update(desc, sg, nbytes);
+	update2(desc, sg, nbytes);
 	return final(desc, out);
 }
 
-int crypto_init_digest_flags(struct crypto_tfm *tfm, u32 flags)
-{
-	return flags ? -EINVAL : 0;
-}
-
 int crypto_init_digest_ops(struct crypto_tfm *tfm)
 {
 	struct hash_tfm *ops = &tfm->crt_hash;