'\" t
.\"     Title: sata_scr_read
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: May 2018
.\"    Manual: libata Library
.\"    Source: Kernel Hackers Manual 3.16.56
.\"  Language: English
.\"
.TH "SATA_SCR_READ" "9" "May 2018" "Kernel Hackers Manual 3\&.16\&" "libata Library"
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.SH "NAME"
sata_scr_read \- read SCR register of the specified port
.SH "SYNOPSIS"
.HP \w'int\ sata_scr_read('u
.BI "int sata_scr_read(struct\ ata_link\ *\ " "link" ", int\ " "reg" ", u32\ *\ " "val" ");"
.SH "ARGUMENTS"
.PP
\fIlink\fR
.RS 4
ATA link to read SCR for
.RE
.PP
\fIreg\fR
.RS 4
SCR to read
.RE
.PP
\fIval\fR
.RS 4
Place to store read value
.RE
.SH "DESCRIPTION"
.PP
Read SCR register
\fIreg\fR
of
\fIlink\fR
into *\fIval\fR\&. This function is guaranteed to succeed if
\fIlink\fR
is ap\->link, the cable type of the port is SATA and the port implements \->scr_read\&.
.SH "LOCKING"
.PP
None if
\fIlink\fR
is ap\->link\&. Kernel thread context otherwise\&.
.SH "RETURNS"
.PP
0 on success, negative errno on failure\&.
.SH "AUTHOR"
.PP
\fBJeff Garzik\fR
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br