Regression between rc2 and rc6: ACPI EC problems

From	Wolfram Sang <wsa@the-dreams.de>
Newsgroups	linux.kernel
Subject	Regression between rc2 and rc6: ACPI EC problems
Date	2016-07-06 16:20 +0200
Message-ID	<rRVQd-1PF-15@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Hi,

when upgrading from v4.7-rc2 to rc6 on my Dell Mini 9, battery and
temperature status info got bogus. Here is the major change between the
boot logs:

ACPI : EC: EC stopped
ACPI Exception: AE_BAD_PARAMETER, Returned by Handler for [EmbeddedControl] (20160422/evregion-300)
ACPI Error: Method parse/execution failed [\_SB.PCI0.LPCB.EC0._REG] (Node f5d09870), AE_BAD_PARAMETER (20160422/psparse-542)
ACPI Exception: AE_BAD_PARAMETER, from region _REG, [EmbeddedControl] (20160422/evregion-397)
ACPI Exception: AE_BAD_PARAMETER, Returned by Handler for [EmbeddedControl] (20160422/evregion-300)
ACPI Error: Method parse/execution failed [\_SB.PCI0.LPCB.EC0._REG] (Node f5d09870), AE_BAD_PARAMETER (20160422/psparse-542)
ACPI Exception: AE_BAD_PARAMETER, from region _REG, [EmbeddedControl] (20160422/evregion-397)
ACPI : EC: GPE = 0x19, I/O: command/status = 0x66, data = 0x62
ACPI : EC: EC started

The only config changes between the kernels were enabling MMC block
devices and DM_CRYPT. Not likely to cause the above, I'd think.

Does that ring a bell for someone? This little machine has only an SSD
without TRIM, so bisecting is not really an option. I can provide more
info and test patches, though.

Thanks,

   Wolfram

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Regression between rc2 and rc6: ACPI EC problems Wolfram Sang <wsa@the-dreams.de> - 2016-07-06 16:20 +0200
  Re: Regression between rc2 and rc6: ACPI EC problems "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-06 23:30 +0200
    RE: Regression between rc2 and rc6: ACPI EC problems "Zheng, Lv" <lv.zheng@intel.com> - 2016-07-07 02:30 +0200
      Re: Regression between rc2 and rc6: ACPI EC problems "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-07 02:40 +0200
        RE: Regression between rc2 and rc6: ACPI EC problems "Zheng, Lv" <lv.zheng@intel.com> - 2016-07-07 02:40 +0200
  RE: Regression between rc2 and rc6: ACPI EC problems "Zheng, Lv" <lv.zheng@intel.com> - 2016-07-07 02:40 +0200
  RE: Regression between rc2 and rc6: ACPI EC problems "Zheng, Lv" <lv.zheng@intel.com> - 2016-07-07 02:40 +0200
  [RFC PATCH] ACPI / EC: Fix an order issue in ec_remove_handlers() Lv Zheng <lv.zheng@intel.com> - 2016-07-07 04:00 +0200
    RE: [RFC PATCH] ACPI / EC: Fix an order issue in  ec_remove_handlers() "Zheng, Lv" <lv.zheng@intel.com> - 2016-07-07 06:40 +0200
  [PATCH v3] ACPI / EC: Fix an order issue in ec_remove_handlers() Lv Zheng <lv.zheng@intel.com> - 2016-07-08 03:30 +0200

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