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usb_serial: Kill port mutex

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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>
This commit is contained in:
Alan Cox
2009-10-06 16:06:46 +01:00
committed by Greg Kroah-Hartman
parent e1108a63e1
commit 82fc594343
3 changed files with 2 additions and 6 deletions
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3
include/linux/usb/serial.h
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@ -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;