[PATCH] pl2303 - status line

I'm attaching a patch to fix status when using Siemens X65
mobile. This mobile use first byte instead of normal UART_STATE
byte.

From: Flavio Leitner <fbl@conectiva.com.br>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Index: gregkh-2.6/drivers/usb/serial/pl2303.c
===================================================================

diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index a52115407ea13f15724cceb0e4a4ddf4727bf5ae..dceda2e43c155c5b995b195e004f5367997993db 100644 (file)
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -817,15 +817,40 @@ static void pl2303_shutdown (struct usb_serial *serial)
        }               
 }
 
+static void pl2303_update_line_status(struct usb_serial_port *port,
+                                     unsigned char *data,
+                                     unsigned int actual_length)
+{
+
+       struct pl2303_private *priv = usb_get_serial_port_data(port);
+       unsigned long flags;
+       u8 status_idx = UART_STATE;
+       u8 length = UART_STATE;
+
+       if ((le16_to_cpu(port->serial->dev->descriptor.idVendor) == SIEMENS_VENDOR_ID) &&
+           (le16_to_cpu(port->serial->dev->descriptor.idProduct) == SIEMENS_PRODUCT_ID_X65)) {
+               length = 1;
+               status_idx = 0;
+       }
+
+       if (actual_length < length)
+               goto exit;
+
+        /* Save off the uart status for others to look at */
+       spin_lock_irqsave(&priv->lock, flags);
+       priv->line_status = data[status_idx];
+       spin_unlock_irqrestore(&priv->lock, flags);
+
+exit:
+       return;
+}
 
 static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
 {
        struct usb_serial_port *port = (struct usb_serial_port *) urb->context;
-       struct pl2303_private *priv = usb_get_serial_port_data(port);
        unsigned char *data = urb->transfer_buffer;
-       unsigned long flags;
+       unsigned int actual_length = urb->actual_length;
        int status;
-       u8 uart_state;
 
        dbg("%s (%d)", __FUNCTION__, port->number);
 
@@ -844,19 +869,9 @@ static void pl2303_read_int_callback (struct urb *urb, struct pt_regs *regs)
                goto exit;
        }
 
-
        usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, urb->transfer_buffer);
+       pl2303_update_line_status(port, data, actual_length);
 
-       if (urb->actual_length < UART_STATE)
-               goto exit;
-
-       /* Save off the uart status for others to look at */
-       uart_state = data[UART_STATE];
-       spin_lock_irqsave(&priv->lock, flags);
-       uart_state |= (priv->line_status & UART_STATE_TRANSIENT_MASK);
-       priv->line_status = uart_state;
-       spin_unlock_irqrestore(&priv->lock, flags);
-               
 exit:
        status = usb_submit_urb (urb, GFP_ATOMIC);
        if (status)