Hi, Rafael > From: Rafael J. Wysocki [mailto:rjw@xxxxxxxxxxxxx] > Sent: Thursday, July 7, 2016 5:29 AM > Subject: Re: Regression between rc2 and rc6: ACPI EC problems > > On Wednesday, July 06, 2016 11:14:11 PM Wolfram Sang wrote: > > 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 [Lv Zheng] This is a known order issue that ACPICA executes _REG(DISCONENCT) after removing the opregion handler. But this issue is not a function failure, it only generates error garbage in the kernel log. So we didn't fix it in a hurry. There is another order issue detected in the same Bugzilla entry that: _REG(CONNECT/DISCONNECT) shouldn't be invoked for SystemMemory/SystemIo and PCI_Config that under a PCI root bus containing _BBN method. Which is also proven by the Windows behavior and spec definitions. I was planning to fix the both issues in the ACPICA upstream. The bug is here for your reference: https://bugzilla.kernel.org/show_bug.cgi?id=102421 For now, since this is just a non-function-failure error report, we can ignore it. Because sometimes, when there are several problems related, we have to make a choice to fix one of them first. Thanks and best regards -Lv > > > > 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. > > There is one commit related directly to EC between -rc2 and -rc6: > > dcf15cbded65 ACPI / EC: Fix a boot EC regresion by restoring boot EC > support for the DSDT EC > > There also are two ACPICA commits in that frame that may be related to it > > 2f38b1b16d92 ACPICA: Namespace: Fix deadlock triggered by MLC > support in dynamic table loading > da4e792550a8 Revert "ACPICA: ACPI 2.0, Hardware: Add > access_width/bit_offset support for acpi_hw_write()" > > but one of them is a revert, so can you please check dcf15cbded65 and > 2f38b1b16d92? > > Thanks, > Rafael ��.n��������+%������w��{.n�����{�����ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
