[CRYPTO]: Use CRYPTO_TFM_REQ_MAY_SLEEP where appropriate

This patch goes through the current users of the crypto layer and sets
CRYPTO_TFM_REQ_MAY_SLEEP at crypto_alloc_tfm() where all crypto operations
are performed in process context.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/block/cryptoloop.c

@@ -57,9 +57,11 @@ cryptoloop_init(struct loop_device *lo, const struct loop_info64 *info)
 	mode = strsep(&cmsp, "-");
 
 	if (mode == NULL || strcmp(mode, "cbc") == 0)
-		tfm = crypto_alloc_tfm(cipher, CRYPTO_TFM_MODE_CBC);
+		tfm = crypto_alloc_tfm(cipher, CRYPTO_TFM_MODE_CBC |
+					       CRYPTO_TFM_REQ_MAY_SLEEP);
 	else if (strcmp(mode, "ecb") == 0)
-		tfm = crypto_alloc_tfm(cipher, CRYPTO_TFM_MODE_ECB);
+		tfm = crypto_alloc_tfm(cipher, CRYPTO_TFM_MODE_ECB |
+					       CRYPTO_TFM_REQ_MAY_SLEEP);
 	if (tfm == NULL)
 		return -EINVAL;
 

drivers/md/dm-crypt.c

@@ -144,7 +144,7 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
 	}
 
 	/* Hash the cipher key with the given hash algorithm */
-	hash_tfm = crypto_alloc_tfm(opts, 0);
+	hash_tfm = crypto_alloc_tfm(opts, CRYPTO_TFM_REQ_MAY_SLEEP);
 	if (hash_tfm == NULL) {
 		ti->error = PFX "Error initializing ESSIV hash";
 		return -EINVAL;
@@ -172,7 +172,8 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
 
 	/* Setup the essiv_tfm with the given salt */
 	essiv_tfm = crypto_alloc_tfm(crypto_tfm_alg_name(cc->tfm),
-	                             CRYPTO_TFM_MODE_ECB);
+	                             CRYPTO_TFM_MODE_ECB |
+	                             CRYPTO_TFM_REQ_MAY_SLEEP);
 	if (essiv_tfm == NULL) {
 		ti->error = PFX "Error allocating crypto tfm for ESSIV";
 		kfree(salt);
@@ -587,7 +588,7 @@ static int crypt_ctr(struct dm_target *ti, unsigned int argc, char **argv)
 		goto bad1;
 	}
 
-	tfm = crypto_alloc_tfm(cipher, crypto_flags);
+	tfm = crypto_alloc_tfm(cipher, crypto_flags | CRYPTO_TFM_REQ_MAY_SLEEP);
 	if (!tfm) {
 		ti->error = PFX "Error allocating crypto tfm";
 		goto bad1;

drivers/net/wireless/airo.c

@@ -1301,7 +1301,7 @@ static int micsetup(struct airo_info *ai) {
 	int i;
 
 	if (ai->tfm == NULL)
-	        ai->tfm = crypto_alloc_tfm("aes", 0);
+	        ai->tfm = crypto_alloc_tfm("aes", CRYPTO_TFM_REQ_MAY_SLEEP);
 
         if (ai->tfm == NULL) {
                 printk(KERN_ERR "airo: failed to load transform for AES\n");

fs/nfsd/nfs4recover.c

@@ -93,7 +93,7 @@ nfs4_make_rec_clidname(char *dname, struct xdr_netobj *clname)
 
 	dprintk("NFSD: nfs4_make_rec_clidname for %.*s\n",
 			clname->len, clname->data);
-	tfm = crypto_alloc_tfm("md5", 0);
+	tfm = crypto_alloc_tfm("md5", CRYPTO_TFM_REQ_MAY_SLEEP);
 	if (tfm == NULL)
 		goto out;
 	cksum.len = crypto_tfm_alg_digestsize(tfm);

net/sunrpc/auth_gss/gss_krb5_crypto.c

@@ -160,7 +160,7 @@ make_checksum(s32 cksumtype, char *header, int hdrlen, struct xdr_buf *body,
 				" unsupported checksum %d", cksumtype);
 			goto out;
 	}
-	if (!(tfm = crypto_alloc_tfm(cksumname, 0)))
+	if (!(tfm = crypto_alloc_tfm(cksumname, CRYPTO_TFM_REQ_MAY_SLEEP)))
 		goto out;
 	cksum->len = crypto_tfm_alg_digestsize(tfm);
 	if ((cksum->data = kmalloc(cksum->len, GFP_KERNEL)) == NULL)

security/seclvl.c

@@ -321,7 +321,7 @@ plaintext_to_sha1(unsigned char *hash, const char *plaintext, int len)
 			      "bytes.\n", len, PAGE_SIZE);
 		return -ENOMEM;
 	}
-	tfm = crypto_alloc_tfm("sha1", 0);
+	tfm = crypto_alloc_tfm("sha1", CRYPTO_TFM_REQ_MAY_SLEEP);
 	if (tfm == NULL) {
 		seclvl_printk(0, KERN_ERR,
 			      "Failed to load transform for SHA1\n");