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Commit 6fdd8e8e authored by Flavio Leitner's avatar Flavio Leitner Committed by Greg Kroah-Hartman
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[PATCH] pl2303 - unplug device. 



It's possible to unplug usb device and do tiocmset() and tiocmget() without
valid interface in pl2303 module.

The patch below check this and return -ENODEV if interface was removed.

From: Flavio Leitner <fbl@conectiva.com.br>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>

diff -purN linux-05-04-11/drivers/usb/serial/pl2303.c linux-05-04-11.usb/drivers/usb/serial/pl2303.c
parent 8835f665

drivers/usb/serial/pl2303.c

+6 −0
Original line number Diff line number Diff line
@@ -677,6 +677,9 @@ static int pl2303_tiocmset (struct usb_serial_port *port, struct file *file, 
	unsigned long flags;

	u8 control;



	if (!usb_get_intfdata(port->serial->interface))

		return -ENODEV;



	spin_lock_irqsave (&priv->lock, flags);

	if (set & TIOCM_RTS)

		priv->line_control |= CONTROL_RTS;
@@ -702,6 +705,9 @@ static int pl2303_tiocmget (struct usb_serial_port *port, struct file *file) 


	dbg("%s (%d)", __FUNCTION__, port->number);



	if (!usb_get_intfdata(port->serial->interface))

		return -ENODEV;



	spin_lock_irqsave (&priv->lock, flags);

	mcr = priv->line_control;

	status = priv->line_status;