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Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/ker…
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…nel/git/jgarzik/libata-dev

* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  [libata] sata_promise: comment out duplicate PCI ID
  [PATCH] libata: improve EH action and EHI flag handling
  [PATCH] libata: fix eh_skip_recovery condition
  [PATCH] libata: fix autopsy ehc->i.action and ehc->i.dev handling
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Linus Torvalds committed Jul 29, 2006
2 parents 4da3dcf + ab3b3fd commit dc710af
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Showing 3 changed files with 54 additions and 26 deletions.
69 changes: 44 additions & 25 deletions drivers/scsi/libata-eh.c
View file
Expand Up @@ -764,12 +764,27 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
unsigned int action)
{
unsigned long flags;
struct ata_eh_info *ehi = &ap->eh_info;
struct ata_eh_context *ehc = &ap->eh_context;

spin_lock_irqsave(ap->lock, flags);

ata_eh_clear_action(dev, &ap->eh_info, action);
/* Reset is represented by combination of actions and EHI
* flags. Suck in all related bits before clearing eh_info to
* avoid losing requested action.
*/
if (action & ATA_EH_RESET_MASK) {
ehc->i.action |= ehi->action & ATA_EH_RESET_MASK;
ehc->i.flags |= ehi->flags & ATA_EHI_RESET_MODIFIER_MASK;

/* make sure all reset actions are cleared & clear EHI flags */
action |= ATA_EH_RESET_MASK;
ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
}

ata_eh_clear_action(dev, ehi, action);

if (!(ap->eh_context.i.flags & ATA_EHI_QUIET))
if (!(ehc->i.flags & ATA_EHI_QUIET))
ap->pflags |= ATA_PFLAG_RECOVERED;

spin_unlock_irqrestore(ap->lock, flags);
Expand All @@ -790,6 +805,12 @@ static void ata_eh_about_to_do(struct ata_port *ap, struct ata_device *dev,
static void ata_eh_done(struct ata_port *ap, struct ata_device *dev,
unsigned int action)
{
/* if reset is complete, clear all reset actions & reset modifier */
if (action & ATA_EH_RESET_MASK) {
action |= ATA_EH_RESET_MASK;
ap->eh_context.i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
}

ata_eh_clear_action(dev, &ap->eh_context.i, action);
}

Expand Down Expand Up @@ -1276,8 +1297,6 @@ static int ata_eh_speed_down(struct ata_device *dev, int is_io,
static void ata_eh_autopsy(struct ata_port *ap)
{
struct ata_eh_context *ehc = &ap->eh_context;
unsigned int action = ehc->i.action;
struct ata_device *failed_dev = NULL;
unsigned int all_err_mask = 0;
int tag, is_io = 0;
u32 serror;
Expand All @@ -1294,7 +1313,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
ehc->i.serror |= serror;
ata_eh_analyze_serror(ap);
} else if (rc != -EOPNOTSUPP)
action |= ATA_EH_HARDRESET;
ehc->i.action |= ATA_EH_HARDRESET;

/* analyze NCQ failure */
ata_eh_analyze_ncq_error(ap);
Expand All @@ -1315,7 +1334,7 @@ static void ata_eh_autopsy(struct ata_port *ap)
qc->err_mask |= ehc->i.err_mask;

/* analyze TF */
action |= ata_eh_analyze_tf(qc, &qc->result_tf);
ehc->i.action |= ata_eh_analyze_tf(qc, &qc->result_tf);

/* DEV errors are probably spurious in case of ATA_BUS error */
if (qc->err_mask & AC_ERR_ATA_BUS)
Expand All @@ -1329,11 +1348,11 @@ static void ata_eh_autopsy(struct ata_port *ap)
/* SENSE_VALID trumps dev/unknown error and revalidation */
if (qc->flags & ATA_QCFLAG_SENSE_VALID) {
qc->err_mask &= ~(AC_ERR_DEV | AC_ERR_OTHER);
action &= ~ATA_EH_REVALIDATE;
ehc->i.action &= ~ATA_EH_REVALIDATE;
}

/* accumulate error info */
failed_dev = qc->dev;
ehc->i.dev = qc->dev;
all_err_mask |= qc->err_mask;
if (qc->flags & ATA_QCFLAG_IO)
is_io = 1;
Expand All @@ -1342,25 +1361,22 @@ static void ata_eh_autopsy(struct ata_port *ap)
/* enforce default EH actions */
if (ap->pflags & ATA_PFLAG_FROZEN ||
all_err_mask & (AC_ERR_HSM | AC_ERR_TIMEOUT))
action |= ATA_EH_SOFTRESET;
ehc->i.action |= ATA_EH_SOFTRESET;
else if (all_err_mask)
action |= ATA_EH_REVALIDATE;
ehc->i.action |= ATA_EH_REVALIDATE;

/* if we have offending qcs and the associated failed device */
if (failed_dev) {
if (ehc->i.dev) {
/* speed down */
action |= ata_eh_speed_down(failed_dev, is_io, all_err_mask);
ehc->i.action |= ata_eh_speed_down(ehc->i.dev, is_io,
all_err_mask);

/* perform per-dev EH action only on the offending device */
ehc->i.dev_action[failed_dev->devno] |=
action & ATA_EH_PERDEV_MASK;
action &= ~ATA_EH_PERDEV_MASK;
ehc->i.dev_action[ehc->i.dev->devno] |=
ehc->i.action & ATA_EH_PERDEV_MASK;
ehc->i.action &= ~ATA_EH_PERDEV_MASK;
}

/* record autopsy result */
ehc->i.dev = failed_dev;
ehc->i.action |= action;

DPRINTK("EXIT\n");
}

Expand Down Expand Up @@ -1483,6 +1499,9 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
ata_reset_fn_t reset;
int i, did_followup_srst, rc;

/* about to reset */
ata_eh_about_to_do(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);

/* Determine which reset to use and record in ehc->i.action.
* prereset() may examine and modify it.
*/
Expand Down Expand Up @@ -1531,8 +1550,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
ata_port_printk(ap, KERN_INFO, "%s resetting port\n",
reset == softreset ? "soft" : "hard");

/* reset */
ata_eh_about_to_do(ap, NULL, ATA_EH_RESET_MASK);
/* mark that this EH session started with reset */
ehc->i.flags |= ATA_EHI_DID_RESET;

rc = ata_do_reset(ap, reset, classes);
Expand Down Expand Up @@ -1595,7 +1613,7 @@ static int ata_eh_reset(struct ata_port *ap, int classify,
postreset(ap, classes);

/* reset successful, schedule revalidation */
ata_eh_done(ap, NULL, ATA_EH_RESET_MASK);
ata_eh_done(ap, NULL, ehc->i.action & ATA_EH_RESET_MASK);
ehc->i.action |= ATA_EH_REVALIDATE;
}

Expand Down Expand Up @@ -1848,15 +1866,16 @@ static int ata_eh_skip_recovery(struct ata_port *ap)
for (i = 0; i < ata_port_max_devices(ap); i++) {
struct ata_device *dev = &ap->device[i];

if (ata_dev_absent(dev) || ata_dev_ready(dev))
if (!(dev->flags & ATA_DFLAG_SUSPENDED))
break;
}

if (i == ata_port_max_devices(ap))
return 1;

/* always thaw frozen port and recover failed devices */
if (ap->pflags & ATA_PFLAG_FROZEN || ata_port_nr_enabled(ap))
/* thaw frozen port, resume link and recover failed devices */
if ((ap->pflags & ATA_PFLAG_FROZEN) ||
(ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_port_nr_enabled(ap))
return 0;

/* skip if class codes for all vacant slots are ATA_DEV_NONE */
Expand Down
7 changes: 7 additions & 0 deletions drivers/scsi/sata_promise.c
View file
Expand Up @@ -269,8 +269,15 @@ static const struct pci_device_id pdc_ata_pci_tbl[] = {
{ PCI_VENDOR_ID_PROMISE, 0x6629, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
board_20619 },

/* TODO: remove all associated board_20771 code, as it completely
* duplicates board_2037x code, unless reason for separation can be
* divined.
*/
#if 0
{ PCI_VENDOR_ID_PROMISE, 0x3570, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
board_20771 },
#endif

{ } /* terminate list */
};

Expand Down
4 changes: 3 additions & 1 deletion include/linux/libata.h
View file
Expand Up @@ -265,12 +265,14 @@ enum {

/* ata_eh_info->flags */
ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
ATA_EHI_RESUME_LINK = (1 << 1), /* need to resume link */
ATA_EHI_RESUME_LINK = (1 << 1), /* resume link (reset modifier) */
ATA_EHI_NO_AUTOPSY = (1 << 2), /* no autopsy */
ATA_EHI_QUIET = (1 << 3), /* be quiet */

ATA_EHI_DID_RESET = (1 << 16), /* already reset this port */

ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,

/* max repeat if error condition is still set after ->error_handler */
ATA_EH_MAX_REPEAT = 5,

Expand Down

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