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| author | Rui Wang <rui.y.wang@intel.com> | 2016-08-17 10:00:37 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-08-18 11:45:19 +0200 |
| commit | 624cad9d2907a0788b56e3ca664c5d7d02645ed4 (patch) | |
| tree | 03b017e91a76ed7f263ae42bff7b77f3f1c41f4b /drivers/acpi | |
| parent | x86/ioapic: Fix lost IOAPIC resource after hot-removal and hotadd (diff) | |
| download | linux-624cad9d2907a0788b56e3ca664c5d7d02645ed4.tar.xz linux-624cad9d2907a0788b56e3ca664c5d7d02645ed4.zip | |
x86/ioapic: Fix IOAPIC failing to request resource
handle_ioapic_add() uses request_resource() to request ACPI "_CRS"
resources. This can fail with the following error message:
[ 247.325693] ACPI: \_SB_.IIO1.AID1: failed to insert resource
This happens when there are multiple IOAPICs and DSDT groups their
"_CRS" resources as the children of a parent resource, as seen from
/proc/iomem:
fec00000-fecfffff : PNP0003:00
fec00000-fec003ff : IOAPIC 0
fec01000-fec013ff : IOAPIC 1
fec40000-fec403ff : IOAPIC 2
In this case request_resource() fails because there's a conflicting
resource which is the parent (fec0000-fecfffff). Fix it by using
insert_resource() which can request resources by taking the conflicting
resource as the parent.
Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: bhelgaas@google.com
Cc: helgaas@kernel.org
Cc: linux-acpi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: rjw@rjwysocki.net
Cc: tony.luck@intel.com
Link: http://lkml.kernel.org/r/1471420837-31003-6-git-send-email-rui.y.wang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/ioapic.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/acpi/ioapic.c b/drivers/acpi/ioapic.c index ee201111e063..6d7ce6e12aaa 100644 --- a/drivers/acpi/ioapic.c +++ b/drivers/acpi/ioapic.c @@ -146,10 +146,12 @@ static acpi_status handle_ioapic_add(acpi_handle handle, u32 lvl, crs_res = &ioapic->res; acpi_walk_resources(handle, METHOD_NAME__CRS, setup_res, crs_res); + crs_res->name = type; + crs_res->flags |= IORESOURCE_BUSY; if (crs_res->flags == 0) { acpi_handle_warn(handle, "failed to get resource\n"); goto exit_release; - } else if (request_resource(&iomem_resource, crs_res)) { + } else if (insert_resource(&iomem_resource, crs_res)) { acpi_handle_warn(handle, "failed to insert resource\n"); goto exit_release; } |