cifs: clean up sync_mid_result

Make it use a switch statement based on the value of the midStatus. If
the resp_buf is set, then MID_RESPONSE_RECEIVED is too.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index f65cdec..6abd144 100644 (file)
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -363,28 +363,29 @@ sync_mid_result(struct mid_q_entry *mid, struct TCP_Server_Info *server)
 {
        int rc = 0;
 
-       spin_lock(&GlobalMid_Lock);
+       cFYI(1, "%s: cmd=%d mid=%d state=%d", __func__, mid->command,
+               mid->mid, mid->midState);
 
-       if (mid->resp_buf) {
+       spin_lock(&GlobalMid_Lock);
+       switch (mid->midState) {
+       case MID_RESPONSE_RECEIVED:
                spin_unlock(&GlobalMid_Lock);
                return rc;
-       }
-
-       cERROR(1, "No response to cmd %d mid %d", mid->command, mid->mid);
-       if (mid->midState == MID_REQUEST_SUBMITTED) {
-               if (server->tcpStatus == CifsExiting)
+       case MID_REQUEST_SUBMITTED:
+               /* socket is going down, reject all calls */
+               if (server->tcpStatus == CifsExiting) {
+                       cERROR(1, "%s: canceling mid=%d cmd=0x%x state=%d",
+                              __func__, mid->mid, mid->command, mid->midState);
                        rc = -EHOSTDOWN;
-               else
-                       mid->midState = MID_RETRY_NEEDED;
-       }
-
-       if (rc != -EHOSTDOWN) {
-               if (mid->midState == MID_RETRY_NEEDED) {
-                       rc = -EAGAIN;
-                       cFYI(1, "marking request for retry");
-               } else {
-                       rc = -EIO;
+                       break;
                }
+       case MID_RETRY_NEEDED:
+               rc = -EAGAIN;
+               break;
+       default:
+               cERROR(1, "%s: invalid mid state mid=%d state=%d", __func__,
+                       mid->mid, mid->midState);
+               rc = -EIO;
        }
        spin_unlock(&GlobalMid_Lock);