Hi, Can the problem be fixed by invoking acpi_put_table() for mapped DMAR table?
Thanks Lv > From: Dou Liyang [mailto:douly.f...@cn.fujitsu.com] > Sent: Friday, July 14, 2017 1:53 PM > To: x...@kernel.org; linux-kernel@vger.kernel.org > Cc: t...@linutronix.de; mi...@kernel.org; h...@zytor.com; > ebied...@xmission.com; b...@redhat.com; > pet...@infradead.org; izumi.t...@jp.fujitsu.com; > tokunaga.kei...@jp.fujitsu.com; Dou Liyang > <douly.f...@cn.fujitsu.com>; linux-a...@vger.kernel.org; Rafael J. Wysocki > <r...@rjwysocki.net>; Zheng, > Lv <lv.zh...@intel.com>; Julian Wollrath <jwollr...@web.de> > Subject: [PATCH v7 12/13] ACPI / init: Invoke early ACPI initialization > earlier > > Linux uses acpi_early_init() to put the ACPI table management into > the late stage from the early stage where the mapped ACPI tables is > temporary and should be unmapped. > > But, now initializing interrupt delivery mode should map and parse the > DMAR table earlier in the early stage. This causes an ACPI error when > Linux reallocates the ACPI root tables. Because Linux doesn't unmapped > the DMAR table after using in the early stage. > > Invoke acpi_early_init() earlier before late_time_init(), Keep the DMAR > be mapped and parsed in late stage like before. > > Reported-by: Xiaolong Ye <xiaolong...@intel.com> > Signed-off-by: Dou Liyang <douly.f...@cn.fujitsu.com> > Cc: linux-a...@vger.kernel.org > Cc: Rafael J. Wysocki <r...@rjwysocki.net> > Cc: Zheng, Lv <lv.zh...@intel.com> > Cc: Julian Wollrath <jwollr...@web.de> > --- > Test in my own PC(Lenovo M4340). > Ask help for doing regression testing for the bug said in commit c4e1acbb35e4 > ("ACPI / init: Invoke early ACPI initialization later"). > > init/main.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/init/main.c b/init/main.c > index df58a41..7a09467 100644 > --- a/init/main.c > +++ b/init/main.c > @@ -654,12 +654,12 @@ asmlinkage __visible void __init start_kernel(void) > kmemleak_init(); > setup_per_cpu_pageset(); > numa_policy_init(); > + acpi_early_init(); > if (late_time_init) > late_time_init(); > calibrate_delay(); > pidmap_init(); > anon_vma_init(); > - acpi_early_init(); > #ifdef CONFIG_X86 > if (efi_enabled(EFI_RUNTIME_SERVICES)) > efi_enter_virtual_mode(); > -- > 2.5.5 > >
