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
struct i2o_message * i2o_msg_get_wait(struct i2o_controller * c, int wait);
how long to wait until timeout
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_CONTROL_MSG(9) USB Core APIs USB_CONTROL_MSG(9)NAME
usb_control_msg - Builds a control urb, sends it off and waits for completion
int usb_control_msg(struct usb_device * dev, unsigned int pipe, __u8 request, __u8 requesttype, __u16 value, __u16 index, void * data,
__u16 size, int timeout);
pointer to the usb device to send the message to
endpoint "pipe" to send the message to
USB message request value
USB message request type value
USB message value
USB message index value
pointer to the data to send
length in bytes of the data to send
time in msecs to wait for the message to complete before timing out (if 0 the wait is forever)
This function sends a simple control message to a specified endpoint and waits for the message to complete, or timeout.
If successful, it returns the number of bytes transferred, otherwise a negative error number.
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_CONTROL_MSG(9)
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