[PATCH 0/2] fix libata-sff and pata_cmd64x to not crash on boot on parisc

[James Bottomley <James.Bottomley@HansenPartnership.com>]

currently libata-sff is completely ignoring the enabled/disabled status
of the interfaces.  This is a real problem on parisc because if you
touch a non responding memory area (i.e. a disabled interface) you crash
the box.

Fix this up by restoring the enablebits logic to the pata_cmd64x driver.
To do this, libata-sff has to be modified not to probe both ports if we
don't have them.  This is done by reintroducing IDE_HFLAG_SINGLE flag as
ATA_HOST_SFF_SINGLE_PORT which drivers can use to condition libata-sff
port probing.

James

---

James Bottomley (2):
  libata-sff: remove hardcoded requirement for two ports
  pata_cmd64x: fix crash on boot with disabled secondary port

 drivers/ata/libata-sff.c  |   75 ++++++++++++++++++++++++++++++++------------
 drivers/ata/pata_cmd64x.c |   22 +++++++++++--
 include/linux/libata.h    |    1 +
 3 files changed, 74 insertions(+), 24 deletions(-)

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1.7.4.1