I2O_MSG_POST_WAIT_CO(9) Message-based devices I2O_MSG_POST_WAIT_CO(9)NAME
i2o_msg_post_wait_complete - Reply to a i2o_msg_post request from IOP
int i2o_msg_post_wait_complete(struct i2o_controller * c, u32 m, struct i2o_message * msg, u32 context);
I2O controller which answers
pointer to the I2O reply message
transaction context of request
This function is called in interrupt context only. If the reply reached before the timeout, the i2o_exec_wait struct is filled with the
message and the task will be waked up. The task is now responsible for returning the message m back to the controller! If the message
reaches us after the timeout clean up the i2o_exec_wait struct (including allocated DMA buffer).
Return 0 on success and if the message m should not be given back to the I2O controller, or >0 on success and if the message should be
given back afterwords. Returns negative error code on failure. In this case the message must also be given back to the controller.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 I2O_MSG_POST_WAIT_CO(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.
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.
If successful, the number of bytes transferred. Otherwise, a negative error number.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 USB_CONTROL_MSG(9)
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