diff options
| author | Flavio Leitner <fbl@conectiva.com.br> | 2005-04-18 17:39:31 -0700 |
|---|---|---|
| committer | Greg K-H <gregkh@suse.de> | 2005-04-18 17:39:31 -0700 |
| commit | 6fdd8e8e33730a2abc886113bd0b6c4343f63cc9 (patch) | |
| tree | 83b425282fb306a2b96520431867430233955385 /drivers | |
| parent | 8835f6657316162a8937d3f26ccd8f5886ba3845 (diff) | |
| download | lwn-6fdd8e8e33730a2abc886113bd0b6c4343f63cc9.tar.gz lwn-6fdd8e8e33730a2abc886113bd0b6c4343f63cc9.zip | |
[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
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/pl2303.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 3368d2b0412d..a52115407ea1 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; |