diff options
| author | Jiri Slaby <jslaby@suse.cz> | 2019-08-07 13:10:37 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-10-05 12:47:49 +0200 |
| commit | 7779acab604a2e3914d0d7284b158694b4a6098f (patch) | |
| tree | 412fe83bb94e2736ef240d4677993245a62852df /drivers/acpi | |
| parent | c162063313a34ecc66ac1450b1c5386431d2b801 (diff) | |
ACPI / processor: don't print errors for processorIDs == 0xff
[ Upstream commit 2c2b005f549544c13ef4cfb0e4842949066889bc ]
Some platforms define their processors in this manner:
Device (SCK0)
{
Name (_HID, "ACPI0004" /* Module Device */) // _HID: Hardware ID
Name (_UID, "CPUSCK0") // _UID: Unique ID
Processor (CP00, 0x00, 0x00000410, 0x06){}
Processor (CP01, 0x02, 0x00000410, 0x06){}
Processor (CP02, 0x04, 0x00000410, 0x06){}
Processor (CP03, 0x06, 0x00000410, 0x06){}
Processor (CP04, 0x01, 0x00000410, 0x06){}
Processor (CP05, 0x03, 0x00000410, 0x06){}
Processor (CP06, 0x05, 0x00000410, 0x06){}
Processor (CP07, 0x07, 0x00000410, 0x06){}
Processor (CP08, 0xFF, 0x00000410, 0x06){}
Processor (CP09, 0xFF, 0x00000410, 0x06){}
Processor (CP0A, 0xFF, 0x00000410, 0x06){}
Processor (CP0B, 0xFF, 0x00000410, 0x06){}
...
The processors marked as 0xff are invalid, there are only 8 of them in
this case.
So do not print an error on ids == 0xff, just print an info message.
Actually, we could return ENODEV even on the first CPU with ID 0xff, but
ACPI spec does not forbid the 0xff value to be a processor ID. Given
0xff could be a correct one, we would break working systems if we
returned ENODEV.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/acpi')
| -rw-r--r-- | drivers/acpi/acpi_processor.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c index ccf07674a2a0..f81c434ce4c5 100644 --- a/drivers/acpi/acpi_processor.c +++ b/drivers/acpi/acpi_processor.c @@ -281,9 +281,13 @@ static int acpi_processor_get_info(struct acpi_device *device) } if (acpi_duplicate_processor_id(pr->acpi_id)) { - dev_err(&device->dev, - "Failed to get unique processor _UID (0x%x)\n", - pr->acpi_id); + if (pr->acpi_id == 0xff) + dev_info_once(&device->dev, + "Entry not well-defined, consider updating BIOS\n"); + else + dev_err(&device->dev, + "Failed to get unique processor _UID (0x%x)\n", + pr->acpi_id); return -ENODEV; } |