diff options
Diffstat (limited to 'drivers/ata/libata-eh.c')
| -rw-r--r-- | drivers/ata/libata-eh.c | 58 |
1 files changed, 41 insertions, 17 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index b3f7d3c8ae6..8256655ce7d 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -50,6 +50,28 @@ enum { ATA_EH_SPDN_FALLBACK_TO_PIO = (1 << 2), }; +/* Waiting in ->prereset can never be reliable. It's sometimes nice + * to wait there but it can't be depended upon; otherwise, we wouldn't + * be resetting. Just give it enough time for most drives to spin up. + */ +enum { + ATA_EH_PRERESET_TIMEOUT = 10 * HZ, +}; + +/* The following table determines how we sequence resets. Each entry + * represents timeout for that try. The first try can be soft or + * hardreset. All others are hardreset if available. In most cases + * the first reset w/ 10sec timeout should succeed. Following entries + * are mostly for error handling, hotplug and retarded devices. + */ +static const unsigned long ata_eh_reset_timeouts[] = { + 10 * HZ, /* most drives spin up by 10sec */ + 10 * HZ, /* > 99% working drives spin up before 20sec */ + 35 * HZ, /* give > 30 secs of idleness for retarded devices */ + 5 * HZ, /* and sweet one last chance */ + /* > 1 min has elapsed, give up */ +}; + static void __ata_port_freeze(struct ata_port *ap); static void ata_eh_finish(struct ata_port *ap); #ifdef CONFIG_PM @@ -1603,8 +1625,9 @@ static int ata_eh_reset(struct ata_port *ap, int classify, { struct ata_eh_context *ehc = &ap->eh_context; unsigned int *classes = ehc->classes; - int tries = ATA_EH_RESET_TRIES; int verbose = !(ehc->i.flags & ATA_EHI_QUIET); + int try = 0; + unsigned long deadline; unsigned int action; ata_reset_fn_t reset; int i, did_followup_srst, rc; @@ -1624,7 +1647,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify, ehc->i.action |= ATA_EH_HARDRESET; if (prereset) { - rc = prereset(ap, jiffies + 40 * HZ); + rc = prereset(ap, jiffies + ATA_EH_PRERESET_TIMEOUT); if (rc) { if (rc == -ENOENT) { ata_port_printk(ap, KERN_DEBUG, @@ -1665,6 +1688,8 @@ static int ata_eh_reset(struct ata_port *ap, int classify, } retry: + deadline = jiffies + ata_eh_reset_timeouts[try++]; + /* shut up during boot probing */ if (verbose) ata_port_printk(ap, KERN_INFO, "%s resetting port\n", @@ -1676,7 +1701,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify, else ehc->i.flags |= ATA_EHI_DID_SOFTRESET; - rc = ata_do_reset(ap, reset, classes, jiffies + 40 * HZ); + rc = ata_do_reset(ap, reset, classes, deadline); did_followup_srst = 0; if (reset == hardreset && @@ -1693,7 +1718,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify, } ata_eh_about_to_do(ap, NULL, ATA_EH_RESET_MASK); - rc = ata_do_reset(ap, reset, classes, jiffies + 40 * HZ); + rc = ata_do_reset(ap, reset, classes, deadline); if (rc == 0 && classify && classes[0] == ATA_DEV_UNKNOWN) { @@ -1703,22 +1728,21 @@ static int ata_eh_reset(struct ata_port *ap, int classify, } } - if (rc && --tries) { - const char *type; + if (rc && try < ARRAY_SIZE(ata_eh_reset_timeouts)) { + unsigned long now = jiffies; - if (reset == softreset) { - if (did_followup_srst) - type = "follow-up soft"; - else - type = "soft"; - } else - type = "hard"; + if (time_before(now, deadline)) { + unsigned long delta = deadline - jiffies; - ata_port_printk(ap, KERN_WARNING, - "%sreset failed, retrying in 5 secs\n", type); - ssleep(5); + ata_port_printk(ap, KERN_WARNING, "reset failed " + "(errno=%d), retrying in %u secs\n", + rc, (jiffies_to_msecs(delta) + 999) / 1000); + + schedule_timeout_uninterruptible(delta); + } - if (reset == hardreset) + if (reset == hardreset && + try == ARRAY_SIZE(ata_eh_reset_timeouts) - 1) sata_down_spd_limit(ap); if (hardreset) reset = hardreset; |