diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 7bac906..5a2f2bc 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -458,8 +458,8 @@ CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses)
 		   (otherwise oplock break e.g. would fail) */
 		if (server->maxReq < 2)
 			server->maxReq = CIFS_MAX_REQ; /* 50 */
-		server->maxBuf = min((__u32)le16_to_cpu(rsp->MaxBufSize),
-				(__u32)CIFSMaxBufSize + MAX_CIFS_HDR_SIZE);
+
+		server->maxBuf = le16_to_cpu(rsp->MaxBufSize);
 		server->max_vcs = le16_to_cpu(rsp->MaxNumberVcs);
 		/* even though we do not use raw we might as well set this
 		accurately, in case we ever find a need for it */
@@ -571,8 +571,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifs_ses *ses)
 	if (server->maxReq < 2)
 		server->maxReq = CIFS_MAX_REQ; /* 50 */
 	/* probably no need to store and check maxvcs */
-	server->maxBuf = min(le32_to_cpu(pSMBr->MaxBufferSize),
-			(__u32) CIFSMaxBufSize + MAX_CIFS_HDR_SIZE);
+	server->maxBuf = le32_to_cpu(pSMBr->MaxBufferSize);
 	server->max_rw = le32_to_cpu(pSMBr->MaxRawSize);
 	cFYI(DBG2, "Max buf = %d", ses->server->maxBuf);
 	server->capabilities = le32_to_cpu(pSMBr->Capabilities);
@@ -2822,8 +2821,7 @@ CIFSSMBQueryReparseLinkInfo(const int xid, struct cifs_tcon *tcon,
 	pSMB->TotalDataCount = 0;
 	pSMB->MaxParameterCount = cpu_to_le32(2);
 	/* BB find exact data count max from sess structure BB */
-	pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
-					  MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
+	pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
 	pSMB->MaxSetupCount = 4;
 	pSMB->Reserved = 0;
 	pSMB->ParameterOffset = 0;
@@ -3316,8 +3314,7 @@ smb_init_nttransact(const __u16 sub_command, const int setup_count,
 	pSMB->Reserved = 0;
 	pSMB->TotalParameterCount = cpu_to_le32(parm_len);
 	pSMB->TotalDataCount  = 0;
-	pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
-					  MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
+	pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
 	pSMB->ParameterCount = pSMB->TotalParameterCount;
 	pSMB->DataCount  = pSMB->TotalDataCount;
 	temp_offset = offsetof(struct smb_com_ntransact_req, Parms) +
@@ -3987,8 +3984,7 @@ findFirstRetry:
 	params = 12 + name_len /* includes null */ ;
 	pSMB->TotalDataCount = 0;	/* no EAs */
 	pSMB->MaxParameterCount = cpu_to_le16(10);
-	pSMB->MaxDataCount = cpu_to_le16((tcon->ses->server->maxBuf -
-					  MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
+	pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00);
 	pSMB->MaxSetupCount = 0;
 	pSMB->Reserved = 0;
 	pSMB->Flags = 0;
@@ -4062,8 +4058,7 @@ findFirstRetry:
 			psrch_inf->index_of_last_entry = 2 /* skip . and .. */ +
 				psrch_inf->entries_in_buffer;
 			lnoff = le16_to_cpu(parms->LastNameOffset);
-			if (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE <
-			      lnoff) {
+			if (CIFSMaxBufSize < lnoff) {
 				cERROR(1, "ignoring corrupt resume name");
 				psrch_inf->last_entry = NULL;
 				return rc;
@@ -4106,9 +4101,7 @@ int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
 	byte_count = 0;
 	pSMB->TotalDataCount = 0;       /* no EAs */
 	pSMB->MaxParameterCount = cpu_to_le16(8);
-	pSMB->MaxDataCount =
-		cpu_to_le16((tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) &
-				0xFFFFFF00);
+	pSMB->MaxDataCount = cpu_to_le16(CIFSMaxBufSize & 0xFFFFFF00);
 	pSMB->MaxSetupCount = 0;
 	pSMB->Reserved = 0;
 	pSMB->Flags = 0;
@@ -4190,8 +4183,7 @@ int CIFSFindNext(const int xid, struct cifs_tcon *tcon,
 			psrch_inf->index_of_last_entry +=
 				psrch_inf->entries_in_buffer;
 			lnoff = le16_to_cpu(parms->LastNameOffset);
-			if (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE <
-			      lnoff) {
+			if (CIFSMaxBufSize < lnoff) {
 				cERROR(1, "ignoring corrupt resume name");
 				psrch_inf->last_entry = NULL;
 				return rc;
@@ -6044,12 +6036,7 @@ int CIFSSMBNotify(const int xid, struct cifs_tcon *tcon,
 	pSMB->TotalParameterCount = 0 ;
 	pSMB->TotalDataCount = 0;
 	pSMB->MaxParameterCount = cpu_to_le32(2);
-	/* BB find exact data count max from sess structure BB */
-	pSMB->MaxDataCount = 0; /* same in little endian or be */
-/* BB VERIFY verify which is correct for above BB */
-	pSMB->MaxDataCount = cpu_to_le32((tcon->ses->server->maxBuf -
-					     MAX_CIFS_HDR_SIZE) & 0xFFFFFF00);
-
+	pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
 	pSMB->MaxSetupCount = 4;
 	pSMB->Reserved = 0;
 	pSMB->ParameterOffset = 0;
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 633c246..0ffba09 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -181,7 +181,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 		-EINVAL = invalid transact2
 
  */
-static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
+static int check2ndT2(struct smb_hdr *pSMB)
 {
 	struct smb_t2_rsp *pSMBt;
 	int remaining;
@@ -214,9 +214,9 @@ static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 
 	cFYI(1, "missing %d bytes from transact2, check next response",
 		remaining);
-	if (total_data_size > maxBufSize) {
+	if (total_data_size > CIFSMaxBufSize) {
 		cERROR(1, "TotalDataSize %d is over maximum buffer %d",
-			total_data_size, maxBufSize);
+			total_data_size, CIFSMaxBufSize);
 		return -EINVAL;
 	}
 	return remaining;
@@ -486,7 +486,7 @@ find_cifs_mid(struct TCP_Server_Info *server, struct smb_hdr *buf,
 		    mid->command != buf->Command)
 			continue;
 
-		if (*length == 0 && check2ndT2(buf, server->maxBuf) > 0) {
+		if (*length == 0 && check2ndT2(buf) > 0) {
 			/* We have a multipart transact2 resp */
 			*is_multi_rsp = true;
 			if (mid->resp_buf) {
@@ -3130,8 +3130,7 @@ try_mount_again:
 		cFYI(DBG2, "no very large read support, rsize now 127K");
 	}
 	if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
-		cifs_sb->rsize = min(cifs_sb->rsize,
-			       (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
+		cifs_sb->rsize = min(cifs_sb->rsize, CIFSMaxBufSize);
 
 	cifs_sb->wsize = cifs_negotiate_wsize(tcon, volume_info);
 
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 9f41a10..fd57165 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1868,7 +1868,7 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size,
 		if ((pTcon->ses) &&
 			!(pTcon->ses->capabilities & CAP_LARGE_FILES)) {
 			current_read_size = min_t(const int, current_read_size,
-					pTcon->ses->server->maxBuf - 128);
+					CIFSMaxBufSize);
 		}
 		rc = -EAGAIN;
 		while (rc == -EAGAIN) {
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index d3e6196..c7d80e2 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -124,7 +124,9 @@ static __u32 cifs_ssetup_hdr(struct cifs_ses *ses, SESSION_SETUP_ANDX *pSMB)
 	/*	that we use in next few lines                               */
 	/* Note that header is initialized to zero in header_assemble */
 	pSMB->req.AndXCommand = 0xFF;
-	pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
+	pSMB->req.MaxBufferSize = cpu_to_le16(min_t(u32,
+					CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4,
+					USHRT_MAX));
 	pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
 	pSMB->req.VcNumber = get_next_vcnum(ses);
 
