[CIFS] Defer close of file handle slightly if there are pending writes that

need to get in ahead of it that depend on that file handle. Fixes
occassional bad file handle errors on write with heavy use multiple process
cases.

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

fs/cifs/inode.c

@@ -1006,6 +1006,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
 			__u32 npid = open_file->pid;
 			rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
 						nfid, npid, FALSE);
+			atomic_dec(&open_file->wrtPending);
 			cFYI(1,("SetFSize for attrs rc = %d", rc));
 			if(rc == -EINVAL) {
 				int bytes_written;