sata_link_debounce(9)
NAME
sata_link_debounce - debounce SATA phy status
SYNOPSIS
int sata_link_debounce(struct ata_link * link,
const unsigned long * params,
unsigned long deadline);
ARGUMENTS
- link
- ATA link to debounce SATA phy status for
- params
- timing parameters { interval, duratinon, timeout } in msec
- deadline
- deadline jiffies for the operation
DESCRIPTION
Make sure SStatus of link reaches stable state, determined by holding
the same value where DET is not 1 for duration polled every interval,
before timeout. 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.
timeout is further limited by deadline. The sooner of the two is used.
LOCKING
Kernel thread context (may sleep)
RETURNS
0 on success, -errno on failure.
AUTHOR
- Jeff Garzik
- Author.