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OpenCloudOS-Kernel
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USB: Edgeport USB Serial Converter: convert es_sem to mutex 

Edgeport USB Serial Converter: convert semaphore es_sem to the
mutex API

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Matthias Kaehlcke 2007-12-04 16:15:40 +01:00 committed by Greg Kroah-Hartman
parent 852c4b43bd
commit 241ca64fc5
1 changed files with 11 additions and 10 deletions
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21
drivers/usb/serial/io_ti.c
View File

@ -34,6 +34,7 @@
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/mutex.h>
#include <linux/serial.h>
#include <linux/ioctl.h>
#include <asm/uaccess.h>
@ -133,7 +134,7 @@ struct edgeport_serial {
struct product_info product_info;
u8 TI_I2C_Type; // Type of I2C in UMP
u8 TiReadI2C; // Set to TRUE if we have read the I2c in Boot Mode
struct semaphore es_sem;
struct mutex es_lock;
int num_ports_open;
struct usb_serial *serial;
};
@ -2044,7 +2045,7 @@ static int edge_open (struct usb_serial_port *port, struct file * filp)
dbg ("ShadowMCR 0x%X", edge_port->shadow_mcr);
edge_serial = edge_port->edge_serial;
if (down_interruptible(&edge_serial->es_sem))
if (mutex_lock_interruptible(&edge_serial->es_lock))
return -ERESTARTSYS;
if (edge_serial->num_ports_open == 0) {
/* we are the first port to be opened, let's post the interrupt urb */
@ -2052,7 +2053,7 @@ static int edge_open (struct usb_serial_port *port, struct file * filp)
if (!urb) {
dev_err (&port->dev, "%s - no interrupt urb present, exiting\n", __FUNCTION__);
status = -EINVAL;
goto up_es_sem;
goto release_es_lock;
}
urb->complete = edge_interrupt_callback;
urb->context = edge_serial;
@ -2060,7 +2061,7 @@ static int edge_open (struct usb_serial_port *port, struct file * filp)
status = usb_submit_urb (urb, GFP_KERNEL);
if (status) {
dev_err (&port->dev, "%s - usb_submit_urb failed with value %d\n", __FUNCTION__, status);
goto up_es_sem;
goto release_es_lock;
}
}
@ -2092,13 +2093,13 @@ static int edge_open (struct usb_serial_port *port, struct file * filp)
dbg("%s - exited", __FUNCTION__);
goto up_es_sem;
goto release_es_lock;
unlink_int_urb:
if (edge_port->edge_serial->num_ports_open == 0)
usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
up_es_sem:
up(&edge_serial->es_sem);
release_es_lock:
mutex_unlock(&edge_serial->es_lock);
return status;
}
@ -2137,14 +2138,14 @@ static void edge_close (struct usb_serial_port *port, struct file *filp)
0,
NULL,
0);
down(&edge_serial->es_sem);
mutex_lock(&edge_serial->es_lock);
--edge_port->edge_serial->num_ports_open;
if (edge_port->edge_serial->num_ports_open <= 0) {
/* last port is now closed, let's shut down our interrupt urb */
usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
edge_port->edge_serial->num_ports_open = 0;
}
up(&edge_serial->es_sem);
mutex_unlock(&edge_serial->es_lock);
edge_port->close_pending = 0;
dbg("%s - exited", __FUNCTION__);
@ -2743,7 +2744,7 @@ static int edge_startup (struct usb_serial *serial)
dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
return -ENOMEM;
}
sema_init(&edge_serial->es_sem, 1);
mutex_init(&edge_serial->es_lock);
edge_serial->serial = serial;
usb_set_serial_data(serial, edge_serial);