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authorTejun Heo <htejun@gmail.com>2008-01-24 00:05:14 +0900
committerJeff Garzik <jgarzik@redhat.com>2008-04-17 15:44:16 -0400
commit672b2d65ba83a6f3f801fd3d58851aa9c0725a54 (patch)
treeed3a2fe8013bf8322df637838deccf9f2bc9c92c
parentd692abd92f22a81b38d52c39601871003262841c (diff)
libata: kill ATA_EHI_RESUME_LINK
ATA_EHI_RESUME_LINK has two functions - promote reset to hardreset if ATA_LFLAG_HRST_TO_RESUME is set and preventing EH from shortcutting reset action when probing is requested. The former is gone now and the latter can easily be achieved by making EH to perform at least one reset if reset is requested, which also makes more sense than depending on RESUME_LINK flag. As ATA_EHI_RESUME_LINK was the only EHI reset modifier, this also kills reset modifier handling. Signed-off-by: Tejun Heo <htejun@gmail.com>
-rw-r--r--drivers/ata/libata-eh.c21
-rw-r--r--drivers/ata/libata-pmp.c1
-rw-r--r--drivers/ata/libata-scsi.c1
-rw-r--r--include/linux/libata.h3
4 files changed, 8 insertions, 18 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index f7cae640015..e6584fa7f45 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1079,12 +1079,6 @@ void ata_eh_about_to_do(struct ata_link *link, struct ata_device *dev,
spin_lock_irqsave(ap->lock, flags);
- /* suck in and clear reset modifier */
- if (action & ATA_EH_RESET) {
- ehc->i.flags |= ehi->flags & ATA_EHI_RESET_MODIFIER_MASK;
- ehi->flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
- }
-
ata_eh_clear_action(link, dev, ehi, action);
if (!(ehc->i.flags & ATA_EHI_QUIET))
@@ -1110,10 +1104,6 @@ void ata_eh_done(struct ata_link *link, struct ata_device *dev,
{
struct ata_eh_context *ehc = &link->eh_context;
- /* if reset is complete, clear reset modifier */
- if (action & ATA_EH_RESET)
- ehc->i.flags &= ~ATA_EHI_RESET_MODIFIER_MASK;
-
ata_eh_clear_action(link, dev, &ehc->i, action);
}
@@ -2491,6 +2481,7 @@ static int ata_link_nr_vacant(struct ata_link *link)
static int ata_eh_skip_recovery(struct ata_link *link)
{
+ struct ata_port *ap = link->ap;
struct ata_eh_context *ehc = &link->eh_context;
struct ata_device *dev;
@@ -2498,9 +2489,13 @@ static int ata_eh_skip_recovery(struct ata_link *link)
if (link->flags & ATA_LFLAG_DISABLED)
return 1;
- /* thaw frozen port, resume link and recover failed devices */
- if ((link->ap->pflags & ATA_PFLAG_FROZEN) ||
- (ehc->i.flags & ATA_EHI_RESUME_LINK) || ata_link_nr_enabled(link))
+ /* thaw frozen port and recover failed devices */
+ if ((ap->pflags & ATA_PFLAG_FROZEN) || ata_link_nr_enabled(link))
+ return 0;
+
+ /* reset at least once if reset is requested */
+ if ((ehc->i.action & ATA_EH_RESET) &&
+ !(ehc->i.flags & ATA_EHI_DID_RESET))
return 0;
/* skip if class codes for all vacant slots are ATA_DEV_NONE */
diff --git a/drivers/ata/libata-pmp.c b/drivers/ata/libata-pmp.c
index 7f8bcffa81a..df1d3252b9e 100644
--- a/drivers/ata/libata-pmp.c
+++ b/drivers/ata/libata-pmp.c
@@ -437,7 +437,6 @@ static int sata_pmp_init_links(struct ata_port *ap, int nr_ports)
link->flags = 0;
ehc->i.probe_mask |= 1;
ehc->i.action |= ATA_EH_RESET;
- ehc->i.flags |= ATA_EHI_RESUME_LINK;
}
return 0;
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 1f036a7b14f..caffca7dd76 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3517,7 +3517,6 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
struct ata_eh_info *ehi = &dev->link->eh_info;
ehi->probe_mask |= 1 << dev->devno;
ehi->action |= ATA_EH_RESET;
- ehi->flags |= ATA_EHI_RESUME_LINK;
} else
rc = -EINVAL;
}
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 1524af6f018..4093e3b6a8b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -301,7 +301,6 @@ enum {
/* ata_eh_info->flags */
ATA_EHI_HOTPLUGGED = (1 << 0), /* could have been hotplugged */
- 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 */
@@ -312,7 +311,6 @@ enum {
ATA_EHI_POST_SETMODE = (1 << 20), /* revaildating after setmode */
ATA_EHI_DID_RESET = ATA_EHI_DID_SOFTRESET | ATA_EHI_DID_HARDRESET,
- ATA_EHI_RESET_MODIFIER_MASK = ATA_EHI_RESUME_LINK,
/* max tries if error condition is still set after ->error_handler */
ATA_EH_MAX_TRIES = 5,
@@ -1095,7 +1093,6 @@ extern void ata_ehi_clear_desc(struct ata_eh_info *ehi);
static inline void ata_ehi_schedule_probe(struct ata_eh_info *ehi)
{
- ehi->flags |= ATA_EHI_RESUME_LINK;
ehi->action |= ATA_EH_RESET;
ehi->probe_mask |= (1 << ATA_MAX_DEVICES) - 1;
}