Man page 9 : sata_link_debounce

sata_link_debounce - debounce SATA phy status

int sata_link_debounce(struct ata_link *  link , const unsigned long *  params , unsigned long  deadline );

link
    ATA link to debounce SATA phy status for

params
    timing parameters { interval, duratinon, timeout } in msec

deadline
    deadline jiffies for the operation

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.

Kernel thread context (may sleep)

0 on success, -errno on failure.

Jeff Garzik
    Author.