[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: 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
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 3368d2b..a5211540 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -677,6 +677,9 @@
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 @@
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;