From: John Tsiombikas <nuclear@xxxxxxxxxxxxxx>
I've got a trivial patch for the pl2303 driver, that's what I needed to
make the wacom serial tablet driver work properly. It uses the
TIOCGSERIAL ioctl to determine if it's talking to a serial device or
not, which I gather is rather common, but the pl2303 driver didn't
implement that ioctl.
Here's a patch, I'm not sure it's absolutely correct, I mostly looked at
other similar usbserial drivers to see what I must do, but it works for
me.
Signed-off-by: John Tsiombikas <nuclear@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/serial/pl2303.c | 13 +++++++++++++
1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 571dcf1..895d072 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -895,10 +895,23 @@ static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
static int pl2303_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
+ struct serial_struct ser;
struct usb_serial_port *port = tty->driver_data;
dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
switch (cmd) {
+ case TIOCGSERIAL:
+ memset(&ser, 0, sizeof ser);
+ ser.type = PORT_16654;
+ ser.line = port->serial->minor;
+ ser.port = port->number;
+ ser.baud_base = 460800;
+
+ if (copy_to_user((void __user *)arg, &ser, sizeof ser))
+ return -EFAULT;
+
+ return 0;
+
case TIOCMIWAIT:
dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
return wait_modem_info(port, arg);
--
1.7.0.1
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