libata: improve probe failure handling

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* Move forcing device to PIO0 on device disable into
  ata_dev_disable().  This makes both old and new EHs act the same
  way.

* Speed down only PIO mode on probe failure.  All commands used during
  probing are PIO commands.  There's no point in speeding down DMA.

* Retry at least once after -ENODEV.  Some devices report garbled
  IDENTIFY data after certain events.  This shouldn't cause device
  detach and re-attach.

* Rearrange EH failure path for simplicity.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

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This commit is contained in:

Tejun Heo 2007-02-02 16:22:30 +09:00 • committed by Jeff Garzik

parent 458337dbb1

commit 4ae72a1e46

2 changed files with 37 additions and 37 deletions

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39

drivers/ata/libata-core.c

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35

drivers/ata/libata-eh.c

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