https://bugzilla.kernel.org/show_bug.cgi?id=50561





--- Comment #3 from Zhang Rui <rui.zh...@intel.com>  2012-11-28 18:14:45 ---
Created an attachment (id=87601)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=87601)
do not evaluate _SDD if it does not exist.

the problem is that libata-acpi is trying to evaluate no-exist _SDD/_GTF
methods.

Alan,
IMO, we should check these control methods first and do not even try to
evaluate these non-exist ACPI control methods, in libata-acpi.c. These ACPI
error messages are really meaningless.

A more proper fix to me is to
1. check the capability during acpi binding
2. take proper actions by checking these capability bits.

what do you think?

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