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USB: usb-serial: replace shutdown with disconnect, release

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This patch (as1254) splits up the shutdown method of usb_serial_driver
into a disconnect and a release method.

The problem is that the usb-serial core was calling shutdown during
disconnect handling, but drivers didn't expect it to be called until
after all the open file references had been closed.  The result was an
oops when the close method tried to use memory that had been
deallocated by shutdown.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Stern
2009-06-02 11:53:55 -04:00
committed by Greg Kroah-Hartman
parent c706ebdfc8
commit f9c99bb8b3
37 changed files with 297 additions and 198 deletions
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6
drivers/usb/serial/cp210x.c
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@@ -50,7 +50,7 @@ static int cp210x_tiocmset_port(struct usb_serial_port *port, struct file *,
unsigned int, unsigned int);
static void cp210x_break_ctl(struct tty_struct *, int);
static int cp210x_startup(struct usb_serial *);
static void cp210x_shutdown(struct usb_serial *);
static void cp210x_disconnect(struct usb_serial *);
static int debug;
@@ -137,7 +137,7 @@ static struct usb_serial_driver cp210x_device = {
.tiocmget = cp210x_tiocmget,
.tiocmset = cp210x_tiocmset,
.attach = cp210x_startup,
.shutdown = cp210x_shutdown,
.disconnect = cp210x_disconnect,
};
/* Config request types */
@@ -792,7 +792,7 @@ static int cp210x_startup(struct usb_serial *serial)
return 0;
}
static void cp210x_shutdown(struct usb_serial *serial)
static void cp210x_disconnect(struct usb_serial *serial)
{
int i;