From 82fc5943430e3cbf15033ed4186a73f90906345d Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Tue, 6 Oct 2009 16:06:46 +0100
Subject: [PATCH] usb_serial: Kill port mutex
The tty port has a port mutex used for all the port related locking so we
don't need the one in the USB serial layer any more.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/serial/opticon.c | 4 ++--
drivers/usb/serial/usb-serial.c | 1 -
include/linux/usb/serial.h | 3 ---
3 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 80f59b6350c..c03fdc0242d 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -501,12 +501,12 @@ static int opticon_resume(struct usb_interface *intf)
struct usb_serial_port *port = serial->port[0];
int result;
- mutex_lock(&port->mutex);
+ mutex_lock(&port->port.mutex);
if (port->port.count)
result = usb_submit_urb(priv->bulk_read_urb, GFP_NOIO);
else
result = 0;
- mutex_unlock(&port->mutex);
+ mutex_unlock(&port->port.mutex);
return result;
}
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 829a46684e1..4543f359be7 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -897,7 +897,6 @@ int usb_serial_probe(struct usb_interface *interface,
spin_lock_init(&port->lock);
/* Keep this for private driver use for the moment but
should probably go away */
- mutex_init(&port->mutex);
INIT_WORK(&port->work, usb_serial_port_work);
serial->port[i] = port;
port->dev.parent = &interface->dev;
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index ce911ebf91e..acf6e457c04 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -39,8 +39,6 @@ enum port_dev_state {
* @serial: pointer back to the struct usb_serial owner of this port.
* @port: pointer to the corresponding tty_port for this port.
* @lock: spinlock to grab when updating portions of this structure.
- * @mutex: mutex used to synchronize serial_open() and serial_close()
- * access for this port.
* @number: the number of the port (the minor number).
* @interrupt_in_buffer: pointer to the interrupt in buffer for this port.
* @interrupt_in_urb: pointer to the interrupt in struct urb for this port.
@@ -77,7 +75,6 @@ struct usb_serial_port {
struct usb_serial *serial;
struct tty_port port;
spinlock_t lock;
- struct mutex mutex;
unsigned char number;
unsigned char *interrupt_in_buffer;
--
2.20.1