[CIFS] Correct cifs tcp retry when some data sent before getting EAGAIN.

Continue implementation of cifs umount begin to allow force unmounts of
cifs mounts.

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 17 insertions, 2 deletions

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index e3177a031edc..fd5eae37f2a8 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -407,9 +407,24 @@ static struct quotactl_ops cifs_quotactl_ops = {
 
 static void cifs_umount_begin(struct super_block * sblock)
 {
-        cERROR(1,("kill all tasks now - umount begin not implemented yet"));
+        struct cifs_sb_info *cifs_sb;
 
-/* BB FIXME - finish BB */
+        cifs_sb = CIFS_SB(sb);
+        if(cifs_sb == NULL)
+                return -EIO;
+        if(cifs_sb->tcon == NULL)
+                return -EIO;
+        down(&tcon->tconSem);
+        if (atomic_read(&tcon->useCount) == 1)
+                tcon->tidStatus = CifsExiting;
+        up(&tcon->tconSem);
+
+        if((cifs->sb->tcon->ses) && (cifs_sb->tcon->ses->server))
+        {
+                cERROR(1,("wake up tasks now - umount begin not complete"));
+                wake_up_all(&server->request_q);
+        }
+/* BB FIXME - finish add checks for tidStatus BB */
 
         return;
 }