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Message-ID: <20060729054112.GA32497@havoc.gtf.org>
Date: Sat, 29 Jul 2006 01:41:12 -0400
From: Jeff Garzik <jeff@...zik.org>
To: Andrew Morton <akpm@...l.org>, Linus Torvalds <torvalds@...l.org>
Cc: linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: [git patches] libata fixes
Please pull from 'upstream-linus' branch of
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev.git upstream-linus
to receive the following updates:
drivers/scsi/libata-eh.c | 69 ++++++++++++++++++++++++++++----------------
drivers/scsi/sata_promise.c | 7 ++++
include/linux/libata.h | 4 +-
3 files changed, 54 insertions(+), 26 deletions(-)
Jeff Garzik:
[libata] sata_promise: comment out duplicate PCI ID
Tejun Heo:
libata: fix autopsy ehc->i.action and ehc->i.dev handling
libata: fix eh_skip_recovery condition
libata: improve EH action and EHI flag handling
diff --git a/drivers/scsi/libata-eh.c b/drivers/scsi/libata-eh.c
index 4b6aa30..29f5934 100644
--- a/drivers/scsi/libata-eh.c
+++ b/drivers/scsi/libata-eh.c
@@ -764,12 +764,27 @@ static void ata_eh_about_to_do(struct at
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);
@@ -790,6 +805,12 @@ static void ata_eh_about_to_do(struct at
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);
}
@@ -1276,8 +1297,6 @@ static int ata_eh_speed_down(struct ata_
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;
@@ -1294,7 +1313,7 @@ static void ata_eh_autopsy(struct ata_po
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);
@@ -1315,7 +1334,7 @@ static void ata_eh_autopsy(struct ata_po
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)
@@ -1329,11 +1348,11 @@ static void ata_eh_autopsy(struct ata_po
/* 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;
@@ -1342,25 +1361,22 @@ static void ata_eh_autopsy(struct ata_po
/* 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");
}
@@ -1483,6 +1499,9 @@ static int ata_eh_reset(struct ata_port
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.
*/
@@ -1531,8 +1550,7 @@ static int ata_eh_reset(struct ata_port
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);
@@ -1595,7 +1613,7 @@ static int ata_eh_reset(struct ata_port
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;
}
@@ -1848,15 +1866,16 @@ static int ata_eh_skip_recovery(struct a
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 */
diff --git a/drivers/scsi/sata_promise.c b/drivers/scsi/sata_promise.c
index 64631bd..4776f4e 100644
--- a/drivers/scsi/sata_promise.c
+++ b/drivers/scsi/sata_promise.c
@@ -269,8 +269,15 @@ static const struct pci_device_id pdc_at
{ 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 */
};
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 6cc497a..66c3100 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -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,
-
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