1I2O_MSG_GET(9)               Message-based devices              I2O_MSG_GET(9)
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NAME

6       i2o_msg_get - obtain an I2O message from the IOP
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SYNOPSIS

9       struct i2o_message * i2o_msg_get(struct i2o_controller * c);
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ARGUMENTS

12       c
13           I2O controller
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DESCRIPTION

16       This function tries to get a message frame. If no message frame is
17       available do not wait until one is available (see also
18       i2o_msg_get_wait). The returned pointer to the message frame is not in
19       I/O memory, it is allocated from a mempool. But because a MFA is
20       allocated from the controller too it is guaranteed that i2o_msg_post
21       will never fail.
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23       On a success a pointer to the message frame is returned. If the message
24       queue is empty -EBUSY is returned and if no memory is available -ENOMEM
25       is returned.
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28Kernel Hackers Manual 3.10         June 2019                    I2O_MSG_GET(9)
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