eCryptfs: remove assignments in if-statements

Remove assignments in if-statements.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

7 files changed, 89 insertions, 64 deletions

diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index 9127b809044d..e3d2118fafad 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1277,8 +1277,8 @@ static int ecryptfs_read_header_region(char *data, struct dentry *dentry,
         mm_segment_t oldfs;
         int rc;
 
-        if ((rc = ecryptfs_open_lower_file(&lower_file, dentry, mnt,
-                                           O_RDONLY))) {
+        rc = ecryptfs_open_lower_file(&lower_file, dentry, mnt, O_RDONLY);
+        if (rc) {
                 printk(KERN_ERR
                        "Error opening lower_file to read header region\n");
                 goto out;
@@ -1289,7 +1289,8 @@ static int ecryptfs_read_header_region(char *data, struct dentry *dentry,
         rc = lower_file->f_op->read(lower_file, (char __user *)data,
                               ECRYPTFS_DEFAULT_EXTENT_SIZE, &lower_file->f_pos);
         set_fs(oldfs);
-        if ((rc = ecryptfs_close_lower_file(lower_file))) {
+        rc = ecryptfs_close_lower_file(lower_file);
+        if (rc) {
                 printk(KERN_ERR "Error closing lower_file\n");
                 goto out;
         }
@@ -1951,9 +1952,10 @@ ecryptfs_add_new_key_tfm(struct ecryptfs_key_tfm **key_tfm, char *cipher_name,
         strncpy(tmp_tfm->cipher_name, cipher_name,
                 ECRYPTFS_MAX_CIPHER_NAME_SIZE);
         tmp_tfm->key_size = key_size;
-        if ((rc = ecryptfs_process_key_cipher(&tmp_tfm->key_tfm,
-                                              tmp_tfm->cipher_name,
-                                              &tmp_tfm->key_size))) {
+        rc = ecryptfs_process_key_cipher(&tmp_tfm->key_tfm,
+                                         tmp_tfm->cipher_name,
+                                         &tmp_tfm->key_size);
+        if (rc) {
                 printk(KERN_ERR "Error attempting to initialize key TFM "
                        "cipher with name = [%s]; rc = [%d]\n",
                        tmp_tfm->cipher_name, rc);
@@ -1988,7 +1990,8 @@ int ecryptfs_get_tfm_and_mutex_for_cipher_name(struct crypto_blkcipher **tfm,
                 }
         }
         mutex_unlock(&key_tfm_list_mutex);
-        if ((rc = ecryptfs_add_new_key_tfm(&key_tfm, cipher_name, 0))) {
+        rc = ecryptfs_add_new_key_tfm(&key_tfm, cipher_name, 0);
+        if (rc) {
                 printk(KERN_ERR "Error adding new key_tfm to list; rc = [%d]\n",
                        rc);
                 goto out;
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index 12ba7e3a69f9..59c846d29a8e 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -230,8 +230,9 @@ static int ecryptfs_open(struct inode *inode, struct file *file)
                 lower_flags &= ~O_APPEND;
         lower_mnt = ecryptfs_dentry_to_lower_mnt(ecryptfs_dentry);
         /* Corresponding fput() in ecryptfs_release() */
-        if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
-                                           lower_flags))) {
+        rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
+                                      lower_flags);
+        if (rc) {
                 ecryptfs_printk(KERN_ERR, "Error opening lower file\n");
                 goto out_puts;
         }
@@ -300,7 +301,8 @@ static int ecryptfs_release(struct inode *inode, struct file *file)
         struct inode *lower_inode = ecryptfs_inode_to_lower(inode);
         int rc;
 
-        if ((rc = ecryptfs_close_lower_file(lower_file))) {
+        rc = ecryptfs_close_lower_file(lower_file);
+        if (rc) {
                 printk(KERN_ERR "Error closing lower_file\n");
                 goto out;
         }
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index abac91c58bfb..d70f5994ba51 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -202,8 +202,9 @@ static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry)
         lower_flags = ((O_CREAT | O_TRUNC) & O_ACCMODE) | O_RDWR;
         lower_mnt = ecryptfs_dentry_to_lower_mnt(ecryptfs_dentry);
         /* Corresponding fput() at end of this function */
-        if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
-                                           lower_flags))) {
+        rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
+                                      lower_flags);
+        if (rc) {
                 ecryptfs_printk(KERN_ERR,
                                 "Error opening dentry; rc = [%i]\n", rc);
                 goto out;
@@ -229,7 +230,8 @@ static int ecryptfs_initialize_file(struct dentry *ecryptfs_dentry)
         }
         rc = grow_file(ecryptfs_dentry, lower_file, inode, lower_inode);
 out_fput:
-        if ((rc = ecryptfs_close_lower_file(lower_file)))
+        rc = ecryptfs_close_lower_file(lower_file);
+        if (rc)
                 printk(KERN_ERR "Error closing lower_file\n");
 out:
         return rc;
@@ -779,8 +781,9 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
         lower_dentry = ecryptfs_dentry_to_lower(dentry);
         /* This dget & mntget is released through fput at out_fput: */
         lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
-        if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
-                                           O_RDWR))) {
+        rc = ecryptfs_open_lower_file(&lower_file, lower_dentry, lower_mnt,
+                                      O_RDWR);
+        if (rc) {
                 ecryptfs_printk(KERN_ERR,
                                 "Error opening dentry; rc = [%i]\n", rc);
                 goto out_free;
@@ -813,11 +816,12 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
                         end_pos_in_page = ((new_length - 1) & ~PAGE_CACHE_MASK);
                 }
                 if (end_pos_in_page != (PAGE_CACHE_SIZE - 1)) {
-                        if ((rc = ecryptfs_write_zeros(&fake_ecryptfs_file,
-                                                       index,
-                                                       (end_pos_in_page + 1),
-                                                       ((PAGE_CACHE_SIZE - 1)
-                                                        - end_pos_in_page)))) {
+                        rc = ecryptfs_write_zeros(&fake_ecryptfs_file,
+                                                  index,
+                                                  (end_pos_in_page + 1),
+                                                  ((PAGE_CACHE_SIZE - 1)
+                                                   - end_pos_in_page));
+                        if (rc) {
                                 printk(KERN_ERR "Error attempting to zero out "
                                        "the remainder of the end page on "
                                        "reducing truncate; rc = [%d]\n", rc);
@@ -849,7 +853,8 @@ int ecryptfs_truncate(struct dentry *dentry, loff_t new_length)
                 = CURRENT_TIME;
         mark_inode_dirty_sync(inode);
 out_fput:
-        if ((rc = ecryptfs_close_lower_file(lower_file)))
+        rc = ecryptfs_close_lower_file(lower_file);
+        if (rc)
                 printk(KERN_ERR "Error closing lower_file\n");
 out_free:
         if (ecryptfs_file_to_private(&fake_ecryptfs_file))
@@ -917,8 +922,9 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
 
                 lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
                 lower_flags = O_RDONLY;
-                if ((rc = ecryptfs_open_lower_file(&lower_file, lower_dentry,
-                                                   lower_mnt, lower_flags))) {
+                rc = ecryptfs_open_lower_file(&lower_file, lower_dentry,
+                                              lower_mnt, lower_flags);
+                if (rc) {
                         printk(KERN_ERR
                                "Error opening lower file; rc = [%d]\n", rc);
                         mutex_unlock(&crypt_stat->cs_mutex);
@@ -926,7 +932,8 @@ static int ecryptfs_setattr(struct dentry *dentry, struct iattr *ia)
                 }
                 mount_crypt_stat = &ecryptfs_superblock_to_private(
                         dentry->d_sb)->mount_crypt_stat;
-                if ((rc = ecryptfs_read_metadata(dentry, lower_file))) {
+                rc = ecryptfs_read_metadata(dentry, lower_file);
+                if (rc) {
                         if (!(mount_crypt_stat->flags
                               & ECRYPTFS_PLAINTEXT_PASSTHROUGH_ENABLED)) {
                                 rc = -EIO;
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 09e2340ab783..89d9710dd63d 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -436,7 +436,8 @@ decrypt_pki_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
         size_t netlink_message_length;
         int rc;
 
-        if ((rc = ecryptfs_get_auth_tok_sig(&auth_tok_sig, auth_tok))) {
+        rc = ecryptfs_get_auth_tok_sig(&auth_tok_sig, auth_tok);
+        if (rc) {
                 printk(KERN_ERR "Unrecognized auth tok type: [%d]\n",
                        auth_tok->token_type);
                 goto out;
@@ -569,8 +570,9 @@ parse_tag_1_packet(struct ecryptfs_crypt_stat *crypt_stat,
                 goto out;
         }
         (*new_auth_tok) = &auth_tok_list_item->auth_tok;
-        if ((rc = parse_packet_length(&data[(*packet_size)], &body_size,
-                                      &length_size))) {
+        rc = parse_packet_length(&data[(*packet_size)], &body_size,
+                                 &length_size);
+        if (rc) {
                 printk(KERN_WARNING "Error parsing packet length; "
                        "rc = [%d]\n", rc);
                 goto out_free;
@@ -702,8 +704,9 @@ parse_tag_3_packet(struct ecryptfs_crypt_stat *crypt_stat,
                 goto out;
         }
         (*new_auth_tok) = &auth_tok_list_item->auth_tok;
-        if ((rc = parse_packet_length(&data[(*packet_size)], &body_size,
-                                      &length_size))) {
+        rc = parse_packet_length(&data[(*packet_size)], &body_size,
+                                 &length_size);
+        if (rc) {
                 printk(KERN_WARNING "Error parsing packet length; rc = [%d]\n",
                        rc);
                 goto out_free;
@@ -849,8 +852,9 @@ parse_tag_11_packet(unsigned char *data, unsigned char *contents,
                 rc = -EINVAL;
                 goto out;
         }
-        if ((rc = parse_packet_length(&data[(*packet_size)], &body_size,
-                                      &length_size))) {
+        rc = parse_packet_length(&data[(*packet_size)], &body_size,
+                                 &length_size);
+        if (rc) {
                 printk(KERN_WARNING "Invalid tag 11 packet format\n");
                 goto out;
         }
@@ -1052,9 +1056,10 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
                        crypt_stat->cipher, rc);
                 goto out;
         }
-        if ((rc = virt_to_scatterlist(auth_tok->session_key.encrypted_key,
-                                      auth_tok->session_key.encrypted_key_size,
-                                      &src_sg, 1)) != 1) {
+        rc = virt_to_scatterlist(auth_tok->session_key.encrypted_key,
+                                 auth_tok->session_key.encrypted_key_size,
+                                 &src_sg, 1);
+        if (rc != 1) {
                 printk(KERN_ERR "Internal error whilst attempting to convert "
                         "auth_tok->session_key.encrypted_key to scatterlist; "
                         "expected rc = 1; got rc = [%d]. "
@@ -1064,9 +1069,10 @@ decrypt_passphrase_encrypted_session_key(struct ecryptfs_auth_tok *auth_tok,
         }
         auth_tok->session_key.decrypted_key_size =
                 auth_tok->session_key.encrypted_key_size;
-        if ((rc = virt_to_scatterlist(auth_tok->session_key.decrypted_key,
-                                      auth_tok->session_key.decrypted_key_size,
-                                      &dst_sg, 1)) != 1) {
+        rc = virt_to_scatterlist(auth_tok->session_key.decrypted_key,
+                                 auth_tok->session_key.decrypted_key_size,
+                                 &dst_sg, 1);
+        if (rc != 1) {
                 printk(KERN_ERR "Internal error whilst attempting to convert "
                         "auth_tok->session_key.decrypted_key to scatterlist; "
                         "expected rc = 1; got rc = [%d]\n", rc);
@@ -1236,18 +1242,17 @@ find_next_matching_auth_tok:
                                         "Considering cadidate auth tok:\n");
                         ecryptfs_dump_auth_tok(candidate_auth_tok);
                 }
-                if ((rc = ecryptfs_get_auth_tok_sig(&candidate_auth_tok_sig,
-                                                    candidate_auth_tok))) {
+                rc = ecryptfs_get_auth_tok_sig(&candidate_auth_tok_sig,
+                                               candidate_auth_tok);
+                if (rc) {
                         printk(KERN_ERR
                                "Unrecognized candidate auth tok type: [%d]\n",
                                candidate_auth_tok->token_type);
                         rc = -EINVAL;
                         goto out_wipe_list;
                 }
-                if ((rc = ecryptfs_find_auth_tok_for_sig(
-                             &matching_auth_tok, crypt_stat,
-                             candidate_auth_tok_sig)))
-                        rc = 0;
+                ecryptfs_find_auth_tok_for_sig(&matching_auth_tok, crypt_stat,
+                                               candidate_auth_tok_sig);
                 if (matching_auth_tok) {
                         found_auth_tok = 1;
                         goto found_matching_auth_tok;
@@ -1605,9 +1610,9 @@ write_tag_3_packet(char *dest, size_t *remaining_bytes,
                 ecryptfs_printk(KERN_DEBUG, "Session key encryption key:\n");
                 ecryptfs_dump_hex(session_key_encryption_key, 16);
         }
-        if ((rc = virt_to_scatterlist(crypt_stat->key,
-                                      key_rec->enc_key_size, &src_sg, 1))
-            != 1) {
+        rc = virt_to_scatterlist(crypt_stat->key, key_rec->enc_key_size,
+                                 &src_sg, 1);
+        if (rc != 1) {
                 ecryptfs_printk(KERN_ERR, "Error generating scatterlist "
                                 "for crypt_stat session key; expected rc = 1; "
                                 "got rc = [%d]. key_rec->enc_key_size = [%d]\n",
@@ -1615,9 +1620,9 @@ write_tag_3_packet(char *dest, size_t *remaining_bytes,
                 rc = -ENOMEM;
                 goto out;
         }
-        if ((rc = virt_to_scatterlist(key_rec->enc_key,
-                                      key_rec->enc_key_size, &dst_sg, 1))
-            != 1) {
+        rc = virt_to_scatterlist(key_rec->enc_key, key_rec->enc_key_size,
+                                 &dst_sg, 1);
+        if (rc != 1) {
                 ecryptfs_printk(KERN_ERR, "Error generating scatterlist "
                                 "for crypt_stat encrypted session key; "
                                 "expected rc = 1; got rc = [%d]. "
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index d4f00bbbcdc5..00686f1c5997 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -188,10 +188,11 @@ static int ecryptfs_init_global_auth_toks(
         list_for_each_entry(global_auth_tok,
                             &mount_crypt_stat->global_auth_tok_list,
                             mount_crypt_stat_list) {
-                if ((rc = ecryptfs_keyring_auth_tok_for_sig(
-                             &global_auth_tok->global_auth_tok_key,
-                             &global_auth_tok->global_auth_tok,
-                             global_auth_tok->sig))) {
+                rc = ecryptfs_keyring_auth_tok_for_sig(
+                        &global_auth_tok->global_auth_tok_key,
+                        &global_auth_tok->global_auth_tok,
+                        global_auth_tok->sig);
+                if (rc) {
                         printk(KERN_ERR "Could not find valid key in user "
                                "session keyring for sig specified in mount "
                                "option: [%s]\n", global_auth_tok->sig);
@@ -355,9 +356,10 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
         if (!cipher_key_bytes_set) {
                 mount_crypt_stat->global_default_cipher_key_size = 0;
         }
-        if ((rc = ecryptfs_add_new_key_tfm(
-                     NULL, mount_crypt_stat->global_default_cipher_name,
-                     mount_crypt_stat->global_default_cipher_key_size))) {
+        rc = ecryptfs_add_new_key_tfm(
+                NULL, mount_crypt_stat->global_default_cipher_name,
+                mount_crypt_stat->global_default_cipher_key_size);
+        if (rc) {
                 printk(KERN_ERR "Error attempting to initialize cipher with "
                        "name = [%s] and key size = [%td]; rc = [%d]\n",
                        mount_crypt_stat->global_default_cipher_name,
@@ -365,7 +367,8 @@ static int ecryptfs_parse_options(struct super_block *sb, char *options)
                 rc = -EINVAL;
                 goto out;
         }
-        if ((rc = ecryptfs_init_global_auth_toks(mount_crypt_stat))) {
+        rc = ecryptfs_init_global_auth_toks(mount_crypt_stat);
+        if (rc) {
                 printk(KERN_WARNING "One or more global auth toks could not "
                        "properly register; rc = [%d]\n", rc);
         }
@@ -458,7 +461,8 @@ static int ecryptfs_read_super(struct super_block *sb, const char *dev_name)
         sb->s_maxbytes = lower_root->d_sb->s_maxbytes;
         ecryptfs_set_dentry_lower(sb->s_root, lower_root);
         ecryptfs_set_dentry_lower_mnt(sb->s_root, lower_mnt);
-        if ((rc = ecryptfs_interpose(lower_root, sb->s_root, sb, 0)))
+        rc = ecryptfs_interpose(lower_root, sb->s_root, sb, 0);
+        if (rc)
                 goto out_free;
         rc = 0;
         goto out;
@@ -765,7 +769,8 @@ static int do_sysfs_registration(void)
 {
         int rc;
 
-        if ((rc = subsystem_register(&ecryptfs_subsys))) {
+        rc = subsystem_register(&ecryptfs_subsys);
+        if (rc) {
                 printk(KERN_ERR
                        "Unable to register ecryptfs sysfs subsystem\n");
                 goto out;
@@ -796,7 +801,8 @@ static void do_sysfs_unregistration(void)
 {
         int rc;
 
-        if ((rc = ecryptfs_destroy_crypto())) {
+        rc = ecryptfs_destroy_crypto();
+        if (rc) {
                 printk(KERN_ERR "Failure whilst attempting to destroy crypto; "
                        "rc = [%d]\n", rc);
         }
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index a9d87c47f72d..a96d341d154d 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -419,8 +419,9 @@ int ecryptfs_init_messaging(unsigned int transport)
         }
         mutex_init(&ecryptfs_daemon_id_hash_mux);
         mutex_lock(&ecryptfs_daemon_id_hash_mux);
-        ecryptfs_hash_buckets = 0;
-        while (ecryptfs_number_of_users >> ++ecryptfs_hash_buckets);
+        ecryptfs_hash_buckets = 1;
+        while (ecryptfs_number_of_users >> ecryptfs_hash_buckets)
+                ecryptfs_hash_buckets++;
         ecryptfs_daemon_id_hash = kmalloc(sizeof(struct hlist_head)
                                           * ecryptfs_hash_buckets, GFP_KERNEL);
         if (!ecryptfs_daemon_id_hash) {
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index 89dbbbbcce07..307f7ee77420 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -762,8 +762,9 @@ ecryptfs_write_zeros(struct file *file, pgoff_t index, int start, int num_zeros)
                 rc = PTR_ERR(tmp_page);
                 goto out;
         }
-        if ((rc = ecryptfs_prepare_write_no_truncate(file, tmp_page, start,
-                                                     (start + num_zeros)))) {
+        rc = ecryptfs_prepare_write_no_truncate(file, tmp_page, start,
+                                                (start + num_zeros));
+        if (rc) {
                 ecryptfs_printk(KERN_ERR, "Error preparing to write zero's "
                                 "to page at index [0x%.16x]\n",
                                 index);