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authorFlavio Leitner <fbl@conectiva.com.br>2005-04-18 17:39:31 -0700
committerGreg K-H <gregkh@suse.de>2005-04-18 17:39:31 -0700
commit6fdd8e8e33730a2abc886113bd0b6c4343f63cc9 (patch)
tree83b425282fb306a2b96520431867430233955385
parent8835f6657316162a8937d3f26ccd8f5886ba3845 (diff)
[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
-rw-r--r--drivers/usb/serial/pl2303.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 3368d2b0412..a52115407ea 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -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;