'\" t
.\"     Title: hsi_async
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: High Speed Synchronous Serial Interface (HSI)
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "HSI_ASYNC" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "High Speed Synchronous Serial"
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.SH "NAME"
hsi_async \- Submit an HSI transfer to the controller
.SH "SYNOPSIS"
.HP \w'int\ hsi_async('u
.BI "int hsi_async(struct\ hsi_client\ *\ " "cl" ", struct\ hsi_msg\ *\ " "msg" ");"
.SH "ARGUMENTS"
.PP
\fIcl\fR
.RS 4
HSI client sending the transfer
.RE
.PP
\fImsg\fR
.RS 4
The HSI transfer passed to controller
.RE
.SH "DESCRIPTION"
.PP
The HSI message must have the channel, ttype, complete and destructor fields set beforehand\&. If nents > 0 then the client has to initialize also the scatterlists to point to the buffers to write to or read from\&.
.PP
HSI controllers relay on pre\-allocated buffers from their clients and they do not allocate buffers on their own\&.
.PP
Once the HSI message transfer finishes, the HSI controller calls the complete callback with the status and actual_len fields of the HSI message updated\&. The complete callback can be called before returning from hsi_async\&.
.PP
Returns \-errno on failure or 0 on success
.SH "COPYRIGHT"
.br