I2O_MSG_GET(9) Message-based devices I2O_MSG_GET(9)
NAME
i2o_msg_get - obtain an I2O message from the IOP
SYNOPSIS
struct i2o_message * i2o_msg_get(struct i2o_controller * c);
ARGUMENTS
c
I2O controller
DESCRIPTION
This function tries to get a message frame. If no message frame is available do not wait until one is availabe (see also i2o_msg_get_wait).
The returned pointer to the message frame is not in I/O memory, it is allocated from a mempool. But because a MFA is allocated from the
controller too it is guaranteed that i2o_msg_post will never fail.
On a success a pointer to the message frame is returned. If the message queue is empty -EBUSY is returned and if no memory is available
-ENOMEM is returned.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 I2O_MSG_GET(9)
