.TH "usb_bulk_msg" 9 "usb_bulk_msg" "25 May 1998" "Kernel Hacker's Manual" LINUX
.SH NAME
usb_bulk_msg \-  Builds a bulk urb, sends it off and waits for completion
.SH SYNOPSIS
.B "int" usb_bulk_msg
.BI "(struct usb_device *" usb_dev ","
.BI "unsigned int " pipe ","
.BI "void *" data ","
.BI "int " len ","
.BI "int *" actual_length ","
.BI "int " timeout ");"
.SH ARGUMENTS
.IP "usb_dev" 12
 pointer to the usb device to send the message to
.IP "pipe" 12
 endpoint "pipe" to send the message to
.IP "data" 12
 pointer to the data to send
.IP "len" 12
 length in bytes of the data to send
.IP "actual_length" 12
 pointer to a location to put the actual length transferred in bytes
.IP "timeout" 12
 time to wait for the message to complete before timing out (if 0 the wait is forever)
.SH "DESCRIPTION"
This function sends a simple bulk message to a specified endpoint
and waits for the message to complete, or timeout.

If successful, it returns 0, otherwise a negative error number.
The number of actual bytes transferred will be stored in the 
actual_length paramater.

Don't use this function from within an interrupt context, like a
bottom half handler.  If you need a asyncronous message, or need to
send a message from within interrupt context, use \fBusb_submit_urb\fP