[PATCH] USB serial: encapsulate schedule_work, remove double-calling

I'm going to throw schedule_work away, it's retarded. But for starters,
let's have it encapsulated.

Also, generic and whiteheat were both calling usb_serial_port_softint
and scheduled work. Only one was necessary.

Signed-off-by: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

18 files changed, 29 insertions, 25 deletions

diff --git a/drivers/usb/serial/cyberjack.c b/drivers/usb/serial/cyberjack.c
index 2357b1d102d7..1fd5c5a9f2ef 100644
--- a/drivers/usb/serial/cyberjack.c
+++ b/drivers/usb/serial/cyberjack.c
@@ -469,7 +469,7 @@ static void cyberjack_write_bulk_callback (struct urb *urb, struct pt_regs *regs
 
 exit:
         spin_unlock(&priv->lock);
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 static int __init cyberjack_init (void)
diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c
index 7212fbe3b6f2..5de76efe1b37 100644
--- a/drivers/usb/serial/cypress_m8.c
+++ b/drivers/usb/serial/cypress_m8.c
@@ -824,7 +824,7 @@ send:
         priv->bytes_out += count; /* do not count the line control and size bytes */
         spin_unlock_irqrestore(&priv->lock, flags);
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 } /* cypress_send */
 
 
diff --git a/drivers/usb/serial/empeg.c b/drivers/usb/serial/empeg.c
index 63f7c78a1152..afca1eae5fb5 100644
--- a/drivers/usb/serial/empeg.c
+++ b/drivers/usb/serial/empeg.c
@@ -335,7 +335,7 @@ static void empeg_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
                 return;
         }
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 1122a0da41c1..590c7ec851db 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1472,7 +1472,7 @@ static void ftdi_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
                 return;
         }
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 } /* ftdi_write_bulk_callback */
 
 
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
index 5ec9bf5bac8d..04767759cf8a 100644
--- a/drivers/usb/serial/garmin_gps.c
+++ b/drivers/usb/serial/garmin_gps.c
@@ -1012,7 +1012,7 @@ static void garmin_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
                 garmin_data_p->flags |= CLEAR_HALT_REQUIRED;
         }
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 
diff --git a/drivers/usb/serial/generic.c b/drivers/usb/serial/generic.c
index c62cc2876519..07a478c59fb2 100644
--- a/drivers/usb/serial/generic.c
+++ b/drivers/usb/serial/generic.c
@@ -299,9 +299,7 @@ void usb_serial_generic_write_bulk_callback (struct urb *urb, struct pt_regs *re
                 return;
         }
 
-        usb_serial_port_softint((void *)port);
-
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 EXPORT_SYMBOL_GPL(usb_serial_generic_write_bulk_callback);
 
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index 9a5c97989562..9da6d2a8f2b0 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -870,7 +870,7 @@ static void ipaq_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
                 spin_unlock_irqrestore(&write_list_lock, flags);
         }
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 static int ipaq_write_room(struct usb_serial_port *port)
diff --git a/drivers/usb/serial/ipw.c b/drivers/usb/serial/ipw.c
index e760a70242c1..a4a0bfeaab00 100644
--- a/drivers/usb/serial/ipw.c
+++ b/drivers/usb/serial/ipw.c
@@ -376,7 +376,7 @@ static void ipw_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
         if (urb->status)
                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 static int ipw_write(struct usb_serial_port *port, const unsigned char *buf, int count)
diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c
index 426182ddc42a..9432c7302275 100644
--- a/drivers/usb/serial/ir-usb.c
+++ b/drivers/usb/serial/ir-usb.c
@@ -408,7 +408,7 @@ static void ir_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
                 urb->actual_length,
                 urb->transfer_buffer);
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 static void ir_read_bulk_callback (struct urb *urb, struct pt_regs *regs)
diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index 052b735c4fbd..2cf6ade704e4 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -481,7 +481,7 @@ static void	usa2x_outdat_callback(struct urb *urb, struct pt_regs *regs)
         dbg ("%s - urb %d", __FUNCTION__, urb == p_priv->out_urbs[1]); 
 
         if (port->open_count)
-                schedule_work(&port->work);
+                usb_serial_port_softint(port);
 }
 
 static void     usa26_inack_callback(struct urb *urb, struct pt_regs *regs)
diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c
index 78335a5f7743..65d79f630fa4 100644
--- a/drivers/usb/serial/kl5kusb105.c
+++ b/drivers/usb/serial/kl5kusb105.c
@@ -569,8 +569,7 @@ static void klsi_105_write_bulk_callback ( struct urb *urb, struct pt_regs *regs
                 return;
         }
 
-        /* from generic_write_bulk_callback */
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 } /* klsi_105_write_bulk_completion_callback */
 
 
diff --git a/drivers/usb/serial/omninet.c b/drivers/usb/serial/omninet.c
index 238033a87092..6dcdb5f598b8 100644
--- a/drivers/usb/serial/omninet.c
+++ b/drivers/usb/serial/omninet.c
@@ -320,7 +320,7 @@ static void omninet_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
                 return;
         }
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 
diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 5cf2b80add7a..759d36087184 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -365,8 +365,7 @@ static void option_outdat_callback(struct urb *urb, struct pt_regs *regs)
 
         port = (struct usb_serial_port *) urb->context;
 
-        if (port->open_count)
-                schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 static void option_instat_callback(struct urb *urb, struct pt_regs *regs)
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index c96714bb1cb8..2ca6dd94796f 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -314,7 +314,7 @@ static void pl2303_send(struct usb_serial_port *port)
                 // TODO: reschedule pl2303_send
         }
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 static int pl2303_write_room(struct usb_serial_port *port)
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 92200f05b531..7a1cc1b04979 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -531,7 +531,17 @@ exit:
         return -EINVAL;
 }
 
-void usb_serial_port_softint(void *private)
+/*
+ * We would be calling tty_wakeup here, but unfortunately some line
+ * disciplines have an annoying habit of calling tty->write from
+ * the write wakeup callback (e.g. n_hdlc.c).
+ */
+void usb_serial_port_softint(struct usb_serial_port *port)
+{
+        schedule_work(&port->work);
+}
+
+static void usb_serial_port_work(void *private)
 {
         struct usb_serial_port *port = private;
         struct tty_struct *tty;
@@ -794,7 +804,7 @@ int usb_serial_probe(struct usb_interface *interface,
                 port->serial = serial;
                 spin_lock_init(&port->lock);
                 mutex_init(&port->mutex);
-                INIT_WORK(&port->work, usb_serial_port_softint, port);
+                INIT_WORK(&port->work, usb_serial_port_work, port);
                 serial->port[i] = port;
         }
 
diff --git a/drivers/usb/serial/usb-serial.h b/drivers/usb/serial/usb-serial.h
index c07ece3fef1d..d53ea9b11e81 100644
--- a/drivers/usb/serial/usb-serial.h
+++ b/drivers/usb/serial/usb-serial.h
@@ -236,7 +236,7 @@ struct usb_serial_driver {
 
 extern int  usb_serial_register(struct usb_serial_driver *driver);
 extern void usb_serial_deregister(struct usb_serial_driver *driver);
-extern void usb_serial_port_softint(void *private);
+extern void usb_serial_port_softint(struct usb_serial_port *port);
 
 extern int usb_serial_probe(struct usb_interface *iface, const struct usb_device_id *id);
 extern void usb_serial_disconnect(struct usb_interface *iface);
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index f5c3841d4843..9e89b8d54f72 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -480,7 +480,7 @@ static void visor_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
         --priv->outstanding_urbs;
         spin_unlock_irqrestore(&priv->lock, flags);
 
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }
 
 
diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c
index f806553cd9a4..582860ac8764 100644
--- a/drivers/usb/serial/whiteheat.c
+++ b/drivers/usb/serial/whiteheat.c
@@ -1089,9 +1089,7 @@ static void whiteheat_write_callback(struct urb *urb, struct pt_regs *regs)
                 return;
         }
 
-        usb_serial_port_softint((void *)port);
-
-        schedule_work(&port->work);
+        usb_serial_port_softint(port);
 }