sata_link_debounce (9) - Linux Man Pages

sata_link_debounce: debounce SATA phy status

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, duration, 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)

RETURN

0 on success, -errno on failure.

AUTHOR

Jeff Garzik

Author.

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