smb: client: Drop 'allocate_crypto' arg from smb*_calc_signature()

Since the crypto library API is now being used instead of crypto_shash,
all structs for MAC computation are now just fixed-size structs
allocated on the stack; no dynamic allocations are ever required.
Besides being much more efficient, this also means that the
'allocate_crypto' argument to smb2_calc_signature() and
smb3_calc_signature() is no longer used.  Remove this unused argument.

Acked-by: Steve French <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Signed-off-by: Eric Biggers <[email protected]>
Signed-off-by: Steve French <[email protected]>

Author: Eric Biggers

fs/smb/client/smb2transport.c

@@ -204,8 +204,7 @@ smb2_find_smb_tcon(struct TCP_Server_Info *server, __u64 ses_id, __u32  tid)
 }
 
 static int
-smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
-		    bool allocate_crypto)
+smb2_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
 {
 	int rc;
 	unsigned char smb2_signature[SMB2_HMACSHA256_SIZE];
@@ -440,8 +439,7 @@ generate_smb311signingkey(struct cifs_ses *ses,
 }
 
 static int
-smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
-		    bool allocate_crypto)
+smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
 {
 	int rc;
 	unsigned char smb3_signature[SMB2_CMACAES_SIZE];
@@ -453,7 +451,7 @@ smb3_calc_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server,
 	u8 key[SMB3_SIGN_KEY_SIZE];
 
 	if (server->vals->protocol_id <= SMB21_PROT_ID)
-		return smb2_calc_signature(rqst, server, allocate_crypto);
+		return smb2_calc_signature(rqst, server);
 
 	rc = smb3_get_sign_key(le64_to_cpu(shdr->SessionId), server, key);
 	if (unlikely(rc)) {
@@ -524,7 +522,7 @@ smb2_sign_rqst(struct smb_rqst *rqst, struct TCP_Server_Info *server)
 		return 0;
 	}
 
-	return smb3_calc_signature(rqst, server, false);
+	return smb3_calc_signature(rqst, server);
 }
 
 int
@@ -560,7 +558,7 @@ smb2_verify_signature(struct smb_rqst *rqst, struct TCP_Server_Info *server)
 
 	memset(shdr->Signature, 0, SMB2_SIGNATURE_SIZE);
 
-	rc = smb3_calc_signature(rqst, server, true);
+	rc = smb3_calc_signature(rqst, server);
 
 	if (rc)
 		return rc;