diff options
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/scsi/libata-eh.c | 123 |
1 files changed, 102 insertions, 21 deletions
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c index a049bffdf77..b53e2e7db49 100644 --- a/drivers/scsi/libata-eh.c +++ b/drivers/scsi/libata-eh.c @@ -932,10 +932,8 @@ static void ata_eh_analyze_serror(struct ata_port *ap) err_mask |= AC_ERR_SYSTEM; action |= ATA_EH_SOFTRESET; } - if (serror & (SERR_PHYRDY_CHG | SERR_DEV_XCHG)) { - err_mask |= AC_ERR_ATA_BUS; - action |= ATA_EH_HARDRESET; - } + if (serror & (SERR_PHYRDY_CHG | SERR_DEV_XCHG)) + ata_ehi_hotplugged(&ehc->i); ehc->i.err_mask |= err_mask; ehc->i.action |= action; @@ -1487,11 +1485,12 @@ static int ata_eh_reset(struct ata_port *ap, int classify, return rc; } -static int ata_eh_revalidate(struct ata_port *ap, - struct ata_device **r_failed_dev) +static int ata_eh_revalidate_and_attach(struct ata_port *ap, + struct ata_device **r_failed_dev) { struct ata_eh_context *ehc = &ap->eh_context; struct ata_device *dev; + unsigned long flags; int i, rc = 0; DPRINTK("ENTER\n"); @@ -1513,6 +1512,23 @@ static int ata_eh_revalidate(struct ata_port *ap, break; ehc->i.action &= ~ATA_EH_REVALIDATE; + } else if (dev->class == ATA_DEV_UNKNOWN && + ehc->tries[dev->devno] && + ata_class_enabled(ehc->classes[dev->devno])) { + dev->class = ehc->classes[dev->devno]; + + rc = ata_dev_read_id(dev, &dev->class, 1, dev->id); + if (rc == 0) + rc = ata_dev_configure(dev, 1); + + if (rc) { + dev->class = ATA_DEV_UNKNOWN; + break; + } + + spin_lock_irqsave(&ap->host_set->lock, flags); + ap->flags |= ATA_FLAG_SCSI_HOTPLUG; + spin_unlock_irqrestore(&ap->host_set->lock, flags); } } @@ -1533,6 +1549,36 @@ static int ata_port_nr_enabled(struct ata_port *ap) return cnt; } +static int ata_port_nr_vacant(struct ata_port *ap) +{ + int i, cnt = 0; + + for (i = 0; i < ATA_MAX_DEVICES; i++) + if (ap->device[i].class == ATA_DEV_UNKNOWN) + cnt++; + return cnt; +} + +static int ata_eh_skip_recovery(struct ata_port *ap) +{ + struct ata_eh_context *ehc = &ap->eh_context; + int i; + + if (ap->flags & ATA_FLAG_FROZEN || ata_port_nr_enabled(ap)) + return 0; + + /* skip if class codes for all vacant slots are ATA_DEV_NONE */ + for (i = 0; i < ATA_MAX_DEVICES; i++) { + struct ata_device *dev = &ap->device[i]; + + if (dev->class == ATA_DEV_UNKNOWN && + ehc->classes[dev->devno] != ATA_DEV_NONE) + return 0; + } + + return 1; +} + /** * ata_eh_recover - recover host port after error * @ap: host port to recover @@ -1543,9 +1589,10 @@ static int ata_port_nr_enabled(struct ata_port *ap) * * This is the alpha and omega, eum and yang, heart and soul of * libata exception handling. On entry, actions required to - * recover each devices are recorded in eh_context. This - * function executes all the operations with appropriate retrials - * and fallbacks to resurrect failed devices. + * recover the port and hotplug requests are recorded in + * eh_context. This function executes all the operations with + * appropriate retrials and fallbacks to resurrect failed + * devices, detach goners and greet newcomers. * * LOCKING: * Kernel thread context (may sleep). @@ -1568,6 +1615,19 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, dev = &ap->device[i]; ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; + + /* process hotplug request */ + if (dev->flags & ATA_DFLAG_DETACH) + ata_eh_detach_dev(dev); + + if (!ata_dev_enabled(dev) && + ((ehc->i.probe_mask & (1 << dev->devno)) && + !(ehc->did_probe_mask & (1 << dev->devno)))) { + ata_eh_detach_dev(dev); + ata_dev_init(dev); + ehc->did_probe_mask |= (1 << dev->devno); + ehc->i.action |= ATA_EH_SOFTRESET; + } } retry: @@ -1575,15 +1635,18 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, rc = 0; /* skip EH if possible. */ - if (!ata_port_nr_enabled(ap) && !(ap->flags & ATA_FLAG_FROZEN)) + if (ata_eh_skip_recovery(ap)) ehc->i.action = 0; + for (i = 0; i < ATA_MAX_DEVICES; i++) + ehc->classes[i] = ATA_DEV_UNKNOWN; + /* reset */ if (ehc->i.action & ATA_EH_RESET_MASK) { ata_eh_freeze_port(ap); - rc = ata_eh_reset(ap, 0, prereset, softreset, hardreset, - postreset); + rc = ata_eh_reset(ap, ata_port_nr_vacant(ap), prereset, + softreset, hardreset, postreset); if (rc) { ata_port_printk(ap, KERN_ERR, "reset failed, giving up\n"); @@ -1593,8 +1656,8 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, ata_eh_thaw_port(ap); } - /* revalidate existing devices */ - rc = ata_eh_revalidate(ap, &dev); + /* revalidate existing devices and attach new ones */ + rc = ata_eh_revalidate_and_attach(ap, &dev); if (rc) goto dev_fail; @@ -1612,6 +1675,8 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, dev_fail: switch (rc) { case -ENODEV: + /* device missing, schedule probing */ + ehc->i.probe_mask |= (1 << dev->devno); case -EINVAL: ehc->tries[dev->devno] = 0; break; @@ -1624,15 +1689,31 @@ static int ata_eh_recover(struct ata_port *ap, ata_prereset_fn_t prereset, ehc->tries[dev->devno] = 0; } - /* disable device if it has used up all its chances */ - if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) + if (ata_dev_enabled(dev) && !ehc->tries[dev->devno]) { + /* disable device if it has used up all its chances */ ata_dev_disable(dev); - /* soft didn't work? be haaaaard */ - if (ehc->i.flags & ATA_EHI_DID_RESET) - ehc->i.action |= ATA_EH_HARDRESET; - else - ehc->i.action |= ATA_EH_SOFTRESET; + /* detach if offline */ + if (ata_port_offline(ap)) + ata_eh_detach_dev(dev); + + /* probe if requested */ + if ((ehc->i.probe_mask & (1 << dev->devno)) && + !(ehc->did_probe_mask & (1 << dev->devno))) { + ata_eh_detach_dev(dev); + ata_dev_init(dev); + + ehc->tries[dev->devno] = ATA_EH_DEV_TRIES; + ehc->did_probe_mask |= (1 << dev->devno); + ehc->i.action |= ATA_EH_SOFTRESET; + } + } else { + /* soft didn't work? be haaaaard */ + if (ehc->i.flags & ATA_EHI_DID_RESET) + ehc->i.action |= ATA_EH_HARDRESET; + else + ehc->i.action |= ATA_EH_SOFTRESET; + } if (ata_port_nr_enabled(ap)) { ata_port_printk(ap, KERN_WARNING, "failed to recover some " |