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| author |   Tejun Heo <htejun@gmail.com> | 2008-01-08 20:26:12 +0900 |
|---|---|---|
| committer |   Jeff Garzik <jeff@garzik.org> | 2008-01-10 16:53:22 -0500 |
| commit | 4ccd3329a2e51473a86547a55f9e5f98f8f65b33 (patch) | |
| tree | 40ef0e858a162c29b8a56392365588333b6eeb1e | |
| parent | libata-pmp: propagate timeout to host link (diff) | |
| download | linux-dev-4ccd3329a2e51473a86547a55f9e5f98f8f65b33.tar.xz linux-dev-4ccd3329a2e51473a86547a55f9e5f98f8f65b33.zip | |
libata: don't normalize UNKNOWN to NONE after reset
After non-classifying reset, ehc->classes[] could contain
ATA_DEV_UNKNOWN which used to be normalized to ATA_DEV_NONE for
consistency. However, this causes unfortunate side effect for drivers
which have non-classifying hardresets (e.g. sata_nv) by making
hardreset report ATA_DEV_NONE for non-classifying resets and thus
makes EH believe that the port is unoccupied and recovery can be
skipped. The end result is that after a device is swapped with
another one, the new device isn't attached after the old one is
detached.
This patch makes ata_eh_reset() not normalize UNKNOWN to NONE after
non-classifying resets. This fixes the above problem. As UNKNOWN and
NONE are handled differently by only EH hotplug logic, this doesn't
cause other behavior changes.
Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Robert Hancock <hancockr@shaw.ca>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
| -rw-r--r-- | drivers/ata/libata-eh.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c index 74269ed22fb9..21a81cd148e4 100644 --- a/drivers/ata/libata-eh.c +++ b/drivers/ata/libata-eh.c @@ -2167,13 +2167,11 @@ int ata_eh_reset(struct ata_link *link, int classify, if (ata_link_offline(link)) continue; - /* apply class override and convert UNKNOWN to NONE */ + /* apply class override */ if (lflags & ATA_LFLAG_ASSUME_ATA) classes[dev->devno] = ATA_DEV_ATA; else if (lflags & ATA_LFLAG_ASSUME_SEMB) classes[dev->devno] = ATA_DEV_SEMB_UNSUP; /* not yet */ - else if (classes[dev->devno] == ATA_DEV_UNKNOWN) - classes[dev->devno] = ATA_DEV_NONE; } /* record current link speed */ |