I2O_MSG_GET_WAIT(9) Message-based devices I2O_MSG_GET_WAIT(9)NAME
i2o_msg_get_wait - obtain an I2O message from the IOP
SYNOPSIS
struct i2o_message * i2o_msg_get_wait(struct i2o_controller * c, int wait);
ARGUMENTS
c
I2O controller
wait
how long to wait until timeout
DESCRIPTION
This function waits up to wait seconds for a message slot to be available.
On a success the message is returned and the pointer to the message is set in msg. The returned message is the physical page frame offset
address from the read port (see the i2o spec). If no message is available returns I2O_QUEUE_EMPTY and msg is leaved untouched.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 I2O_MSG_GET_WAIT(9)
Check Out this Related Man Page
USB_INTERRUPT_MSG(9) USB Core APIs USB_INTERRUPT_MSG(9)NAME
usb_interrupt_msg - Builds an interrupt urb, sends it off and waits for completion
SYNOPSIS
int usb_interrupt_msg(struct usb_device * usb_dev, unsigned int pipe, void * data, int len, int * actual_length, int timeout);
ARGUMENTS
usb_dev
pointer to the usb device to send the message to
pipe
endpoint "pipe" to send the message to
data
pointer to the data to send
len
length in bytes of the data to send
actual_length
pointer to a location to put the actual length transferred in bytes
timeout
time in msecs to wait for the message to complete before timing out (if 0 the wait is forever)
CONTEXT
!in_interrupt ()
DESCRIPTION
This function sends a simple interrupt 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 an asynchronous message, or need to send
a message from within interrupt context, use usb_submit_urb If a thread in your driver uses this call, make sure your disconnect method can
wait for it to complete. Since you don't have a handle on the URB used, you can't cancel the request.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 USB_INTERRUPT_MSG(9)
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