[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>

1 files changed, 4 insertions, 3 deletions

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;