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| author |   Tejun Heo <tj@kernel.org> | 2009-01-29 20:31:32 +0900 |
|---|---|---|
| committer |   Jeff Garzik <jgarzik@redhat.com> | 2009-02-02 23:03:17 -0500 |
| commit | 99cf610aa4840d822cdc67d194b23b55010ca9bd (patch) | |
| tree | 68bc3d6c1f13849731bb7b4b11414b4b0e5fbffb /drivers/ata/libata-eh.c | |
| parent | libata: check onlineness before using SPD in sata_down_spd_limit() (diff) | |
| download | linux-dev-99cf610aa4840d822cdc67d194b23b55010ca9bd.tar.xz linux-dev-99cf610aa4840d822cdc67d194b23b55010ca9bd.zip | |
libata: clear dev->ering in smarter way
dev->ering used to be cleared together with the rest of ata_device in
ata_dev_init() which is called whenever a probing event occurs.
dev->ering is about to be used to track probing failures so it needs
to remain persistent over multiple porbing events. This patch
achieves this by doing the following.
* Instead of CLEAR_OFFSET, define CLEAR_BEGIN and CLEAR_END and only
clear between BEGIN and END. ering is moved after END. The split
of persistent area is to allow hotter items remain at the head.
* ering is explicitly cleared on ata_dev_disable() and when device
attach succeeds. So, ering is persistent throug a device's life
time (unless explicitly cleared of course) and also through periods
inbetween disablement of an attached device and successful detection
of the next one.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/libata-eh.c')
| -rw-r--r-- | drivers/ata/libata-eh.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index aafe82bf5e2e..90092c1aae53 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -1194,6 +1194,11 @@ void ata_dev_disable(struct ata_device *dev) ata_acpi_on_disable(dev); ata_down_xfermask_limit(dev, ATA_DNXFER_FORCE_PIO0 | ATA_DNXFER_QUIET); dev->class++; + + /* From now till the next successful probe, ering is used to + * track probe failures. Clear accumulated device error info. + */ + ata_ering_clear(&dev->ering); } /** @@ -2765,6 +2770,8 @@ static int ata_eh_revalidate_and_attach(struct ata_link *link, readid_flags, dev->id); switch (rc) { case 0: + /* clear error info accumulated during probe */ + ata_ering_clear(&dev->ering); new_mask |= 1 << dev->devno; break; case -ENOENT: |