[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>

6 files changed, 12 insertions, 9 deletions

diff --git a/drivers/block/cryptoloop.c b/drivers/block/cryptoloop.c
index 5be6f998d8c5..3d4261c39f16 100644
--- a/drivers/block/cryptoloop.c
+++ b/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;
 
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index d0a4bab220e5..b82bc3150476 100644
--- a/drivers/md/dm-crypt.c
+++ b/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;
diff --git a/drivers/net/wireless/airo.c b/drivers/net/wireless/airo.c
index df20adcd0730..7fdb85dda4e5 100644
--- a/drivers/net/wireless/airo.c
+++ b/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");
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 57ed50fe7f85..02132f33320d 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/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);
diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c
index 5a7265aeaf83..7ad74449b18f 100644
--- a/net/sunrpc/auth_gss/gss_krb5_crypto.c
+++ b/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)
diff --git a/security/seclvl.c b/security/seclvl.c
index c8e87b22c9bd..96b1f2122f67 100644
--- a/security/seclvl.c
+++ b/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");