cifs: convert list_for_each to entry variant in smb2misc.c

convert list_for_each() to list_for_each_entry() where
applicable.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/smb2misc.c

@@ -164,12 +164,10 @@ smb2_check_message(char *buf, unsigned int len, struct TCP_Server_Info *srvr)
 		struct smb2_transform_hdr *thdr =
 			(struct smb2_transform_hdr *)buf;
 		struct cifs_ses *ses = NULL;
-		struct list_head *tmp;
 
 		/* decrypt frame now that it is completely read in */
 		spin_lock(&cifs_tcp_ses_lock);
-		list_for_each(tmp, &srvr->smb_ses_list) {
-			ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
+		list_for_each_entry(ses, &srvr->smb_ses_list, smb_ses_list) {
 			if (ses->Suid == thdr->SessionId)
 				break;
 
@@ -548,7 +546,6 @@ static bool
 smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp)
 {
 	__u8 lease_state;
-	struct list_head *tmp;
 	struct cifsFileInfo *cfile;
 	struct cifsInodeInfo *cinode;
 	int ack_req = le32_to_cpu(rsp->Flags &
@@ -556,8 +553,7 @@ smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp)
 
 	lease_state = le32_to_cpu(rsp->NewLeaseState);
 
-	list_for_each(tmp, &tcon->openFileList) {
-		cfile = list_entry(tmp, struct cifsFileInfo, tlist);
+	list_for_each_entry(cfile, &tcon->openFileList, tlist) {
 		cinode = CIFS_I(d_inode(cfile->dentry));
 
 		if (memcmp(cinode->lease_key, rsp->LeaseKey,
@@ -618,7 +614,6 @@ static bool
 smb2_is_valid_lease_break(char *buffer)
 {
 	struct smb2_lease_break *rsp = (struct smb2_lease_break *)buffer;
-	struct list_head *tmp, *tmp1, *tmp2;
 	struct TCP_Server_Info *server;
 	struct cifs_ses *ses;
 	struct cifs_tcon *tcon;
@@ -628,15 +623,9 @@ smb2_is_valid_lease_break(char *buffer)
 
 	/* look up tcon based on tid & uid */
 	spin_lock(&cifs_tcp_ses_lock);
-	list_for_each(tmp, &cifs_tcp_ses_list) {
-		server = list_entry(tmp, struct TCP_Server_Info, tcp_ses_list);
-
-		list_for_each(tmp1, &server->smb_ses_list) {
-			ses = list_entry(tmp1, struct cifs_ses, smb_ses_list);
-
-			list_for_each(tmp2, &ses->tcon_list) {
-				tcon = list_entry(tmp2, struct cifs_tcon,
-						  tcon_list);
+	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
+		list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+			list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 				spin_lock(&tcon->open_file_lock);
 				cifs_stats_inc(
 				    &tcon->stats.cifs_stats.num_oplock_brks);
@@ -687,7 +676,6 @@ bool
 smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
 {
 	struct smb2_oplock_break *rsp = (struct smb2_oplock_break *)buffer;
-	struct list_head *tmp, *tmp1, *tmp2;
 	struct cifs_ses *ses;
 	struct cifs_tcon *tcon;
 	struct cifsInodeInfo *cinode;
@@ -710,16 +698,11 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
 
 	/* look up tcon based on tid & uid */
 	spin_lock(&cifs_tcp_ses_lock);
-	list_for_each(tmp, &server->smb_ses_list) {
-		ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
-
-		list_for_each(tmp1, &ses->tcon_list) {
-			tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
+	list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+		list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
 
 			spin_lock(&tcon->open_file_lock);
-			list_for_each(tmp2, &tcon->openFileList) {
-				cfile = list_entry(tmp2, struct cifsFileInfo,
-						     tlist);
+			list_for_each_entry(cfile, &tcon->openFileList, tlist) {
 				if (rsp->PersistentFid !=
 				    cfile->fid.persistent_fid ||
 				    rsp->VolatileFid !=