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[PATCH] USB console: fix disconnection issues

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Prevent sending further output to a USB-serial console after the dongle is
disconnected, take care not to leak kref.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Guennadi Liakhovetski
2006-04-25 07:46:17 +02:00
committed by Greg Kroah-Hartman
parent ca85485c1f
commit 73e487fdb7
3 changed files with 29 additions and 7 deletions
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17
drivers/usb/serial/console.c
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@@ -202,7 +202,7 @@ static void usb_console_write(struct console *co, const char *buf, unsigned coun
struct usb_serial *serial;
int retval = -ENODEV;
if (!port)
if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED)
return;
serial = port->serial;
@@ -255,6 +255,14 @@ static struct console usbcons = {
.index = -1,
};
void usb_serial_console_disconnect(struct usb_serial *serial)
{
if (serial && serial->port && serial->port[0] && serial->port[0] == usbcons_info.port) {
usb_serial_console_exit();
usb_serial_put(serial);
}
}
void usb_serial_console_init (int serial_debug, int minor)
{
debug = serial_debug;
@@ -280,6 +288,11 @@ void usb_serial_console_init (int serial_debug, int minor)
void usb_serial_console_exit (void)
{
unregister_console(&usbcons);
if (usbcons_info.port) {
unregister_console(&usbcons);
if (usbcons_info.port->open_count)
usbcons_info.port->open_count--;
usbcons_info.port = NULL;
}
}