[CIFS] Free small buffers earlier so we exceed the cifs

small req buffer pool less often.
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/cifssmb.c

@@ -1070,7 +1070,7 @@ CIFSSMBRead(const int xid, struct cifsTconInfo *tcon,
 		}
 	}
 
-	cifs_small_buf_release(pSMB);
+/*	cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
 	if(*buf) {
 		if(resp_buf_type == CIFS_SMALL_BUFFER)
 			cifs_small_buf_release(iov[0].iov_base);
@@ -1274,7 +1274,7 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon,
 		*nbytes += le16_to_cpu(pSMBr->Count);
 	} 
 
-	cifs_small_buf_release(pSMB);
+/*	cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
 	if(resp_buf_type == CIFS_SMALL_BUFFER)
 		cifs_small_buf_release(iov[0].iov_base);
 	else if(resp_buf_type == CIFS_LARGE_BUFFER)
@@ -2606,7 +2606,7 @@ CIFSSMBGetCIFSACL(const int xid, struct cifsTconInfo *tcon, __u16 fid,
 		cifs_small_buf_release(iov[0].iov_base);
 	else if(buf_type == CIFS_LARGE_BUFFER)
 		cifs_buf_release(iov[0].iov_base);
-	cifs_small_buf_release(pSMB);
+/*	cifs_small_buf_release(pSMB); */ /* Freed earlier now in SendReceive2 */
 	return rc;
 }
 

fs/cifs/ntlmssp.c

@@ -122,8 +122,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, const int type,
 
 
 /*	rc = SendReceive2(xid, ses, iov, num_iovecs, &resp_buf_type, 0); */
-
-	cifs_small_buf_release(smb_buffer);
+	/* SMB request buf freed in SendReceive2 */
 
 	return rc;
 }

fs/cifs/transport.c

@@ -309,17 +309,16 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 	
 	*pRespBufType = CIFS_NO_BUFFER;  /* no response buf yet */
 
-	if (ses == NULL) {
-		cERROR(1,("Null smb session"));
-		return -EIO;
-	}
-	if(ses->server == NULL) {
-		cERROR(1,("Null tcp session"));
+	if ((ses == NULL) || (ses->server == NULL)) {
+		cifs_small_buf_release(in_buf);
+		cERROR(1,("Null session"));
 		return -EIO;
 	}
 
-	if(ses->server->tcpStatus == CifsExiting)
+	if(ses->server->tcpStatus == CifsExiting) {
+		cifs_small_buf_release(in_buf);
 		return -ENOENT;
+	}
 
 	/* Ensure that we do not send more than 50 overlapping requests 
 	   to the same server. We may make this configurable later or
@@ -346,6 +345,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 			} else {
 				if(ses->server->tcpStatus == CifsExiting) {
 					spin_unlock(&GlobalMid_Lock);
+					cifs_small_buf_release(in_buf);
 					return -ENOENT;
 				}
 
@@ -385,6 +385,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 	midQ = AllocMidQEntry(in_buf, ses);
 	if (midQ == NULL) {
 		up(&ses->server->tcpSem);
+		cifs_small_buf_release(in_buf);
 		/* If not lock req, update # of requests on wire to server */
 		if(long_op < 3) {
 			atomic_dec(&ses->server->inFlight); 
@@ -408,14 +409,18 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 	if(rc < 0) {
 		DeleteMidQEntry(midQ);
 		up(&ses->server->tcpSem);
+		cifs_small_buf_release(in_buf);
 		/* If not lock req, update # of requests on wire to server */
 		if(long_op < 3) {
 			atomic_dec(&ses->server->inFlight); 
 			wake_up(&ses->server->request_q);
 		}
 		return rc;
-	} else
+	} else {
 		up(&ses->server->tcpSem);
+		cifs_small_buf_release(in_buf);
+	}
+
 	if (long_op == -1)
 		goto cifs_no_response_exit2;
 	else if (long_op == 2) /* writes past end of file can take loong time */
@@ -543,6 +548,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 
 out_unlock2:
 	up(&ses->server->tcpSem);
+	cifs_small_buf_release(in_buf);
 	/* If not lock req, update # of requests on wire to server */
 	if(long_op < 3) {
 		atomic_dec(&ses->server->inFlight);