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SubjectRe: [RESEND] [PATCH 2/2] ipaq.c timing parameters
On Mon, 19 Jun 2006 10:46:19 +0200
Frank Gevaerts <frank.gevaerts@fks.be> wrote:

| Adds configurable waiting periods to the ipaq connection code. These are
| not needed when the pocketpc device is running normally when plugged in,
| but they need extra delays if they are physically connected while
| rebooting.
| There are two parameters :
| * initial_wait : this is the delay before the driver attemts to start the
| connection. This is needed because the pocktpc device takes much
| longer to boot if the driver starts sending control packets too soon.
| * connect_retries : this is the number of times the control urb is
| retried before finally giving up. The patch also adds a 1 second delay
| between retries.
| I'm not sure if the cases where this patch is useful are general enough
| to include this in the kernel.
|
| Signed-off-by: Frank Gevaerts <frank.gevaerts@fks.be>
|
| diff -urp linux-2.6.17-rc6.a/drivers/usb/serial/ipaq.c linux-2.6.17-rc6.b/drivers/usb/serial/ipaq.c
| --- linux-2.6.17-rc6.a/drivers/usb/serial/ipaq.c 2006-06-14 16:02:03.000000000 +0200
| +++ linux-2.6.17-rc6.b/drivers/usb/serial/ipaq.c 2006-06-14 16:06:44.000000000 +0200
| @@ -71,6 +71,8 @@
|
| static __u16 product, vendor;
| static int debug;
| +static int connect_retries = KP_RETRIES;
| +static int initial_wait;
|
| /* Function prototypes for an ipaq */
| static int ipaq_open (struct usb_serial_port *port, struct file *filp);
| @@ -583,7 +585,7 @@ static int ipaq_open(struct usb_serial_p
| struct ipaq_private *priv;
| struct ipaq_packet *pkt;
| int i, result = 0;
| - int retries = KP_RETRIES;
| + int retries = connect_retries;
|
| dbg("%s - port %d", __FUNCTION__, port->number);
|
| @@ -647,6 +649,7 @@ static int ipaq_open(struct usb_serial_p
| port->read_urb->transfer_buffer_length = URBDATA_SIZE;
| port->bulk_out_size = port->write_urb->transfer_buffer_length = URBDATA_SIZE;
|
| + msleep(1000*initial_wait);

I was going to say you should use ssleep() here, but I can't find a
ssleep_interruptible(). Then either: use msleep_interruptible() or
creates a new ssleep_interruptible().

| /* Start reading from the device */
| usb_fill_bulk_urb(port->read_urb, serial->dev,
| usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),
| @@ -673,6 +676,7 @@ static int ipaq_open(struct usb_serial_p
| }
| return 0;
| }
| + msleep(1000);
| }

Don't you want msleep(100); here?

--
Luiz Fernando N. Capitulino
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