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[PATCH] pl2303 - unplug device.

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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: Greg 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
This commit is contained in:
Flavio Leitner 2005-04-18 17:39:31 -07:00 committed by Greg K-H
parent 8835f66573
commit 6fdd8e8e33
1 changed files with 6 additions and 0 deletions
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6
drivers/usb/serial/pl2303.c
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@ -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;