'\" t
.\"     Title: sata_link_debounce
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: July 2017
.\"    Manual: libata Library
.\"    Source: Kernel Hackers Manual 4.12.2
.\"  Language: English
.\"
.TH "SATA_LINK_DEBOUNCE" "9" "July 2017" "Kernel Hackers Manual 4\&.12\&" "libata Library"
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.SH "NAME"
sata_link_debounce \- debounce SATA phy status
.SH "SYNOPSIS"
.HP \w'int\ sata_link_debounce('u
.BI "int sata_link_debounce(struct\ ata_link\ *\ " "link" ", const\ unsigned\ long\ *\ " "params" ", unsigned\ long\ " "deadline" ");"
.SH "ARGUMENTS"
.PP
\fIstruct ata_link * link\fR
.RS 4
ATA link to debounce SATA phy status for
.RE
.PP
\fIconst unsigned long * params\fR
.RS 4
timing parameters { interval, duration, timeout } in msec
.RE
.PP
\fIunsigned long deadline\fR
.RS 4
deadline jiffies for the operation
.RE
.SH "DESCRIPTION"
.PP
Make sure SStatus of
\fIlink\fR
reaches stable state, determined by holding the same value where DET is not 1 for
\fIduration\fR
polled every
\fIinterval\fR, before
\fItimeout\fR\&. Timeout constraints the beginning of the stable state\&. Because DET gets stuck at 1 on some controllers after hot unplugging, this functions waits until timeout then returns 0 if DET is stable at 1\&.
.PP
\fItimeout\fR
is further limited by
\fIdeadline\fR\&. The sooner of the two is used\&.
.PP
LOCKING: Kernel thread context (may sleep)
.SH "RETURN"
.PP
0 on success, \-errno on failure\&.
.SH "AUTHOR"
.PP
\fBJeff Garzik\fR
.RS 4
Author.
.RE
.SH "COPYRIGHT"
.br