]> git.baikalelectronics.ru Git - kernel.git/commit
nfit: fix format interface code byte order
authorDan Williams <dan.j.williams@intel.com>
Wed, 29 Jun 2016 18:19:32 +0000 (11:19 -0700)
committerDan Williams <dan.j.williams@intel.com>
Wed, 29 Jun 2016 18:19:32 +0000 (11:19 -0700)
commit22998323379b8df8445a1f7da04877ad1093a63b
tree59d36addebf68b8037a3d05bf1841dc474a2593b
parentc0bcb66e4f44a89fbf8e084770fa7a46a702966d
nfit: fix format interface code byte order

Per JEDEC Annex L Release 3 the SPD data is:

Bits 9~5 00 000 = Function Undefined
         00 001 = Byte addressable energy backed
         00 010 = Block addressed
         00 011 = Byte addressable, no energy backed
         All other codes reserved
Bits 4~0 0 0000 = Proprietary interface
         0 0001 = Standard interface 1
         All other codes reserved; see Definitions of Functions

...and per the ACPI 6.1 spec:

    byte0: Bits 4~0 (0 or 1)
    byte1: Bits 9~5 (1, 2, or 3)

...so a format interface code displayed as 0x301 should be stored in the
nfit as (0x1, 0x3), little-endian.

Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Robert Moore <robert.moore@intel.com>
Cc: Robert Elliott <elliott@hpe.com>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=121161
Fixes: bed28de1efa8 ("nfit: fix format interface code byte order per ACPI6.1")
Fixes: eb0b83215470 ("acpi/nfit: Update nfit driver to comply with ACPI 6.1")
Reported-by: Kristin Jacque <kristin.jacque@intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
drivers/acpi/nfit.c
drivers/acpi/nfit.h