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ACPI: PM: s2idle: Evaluate all Low-Power S0 Idle _DSM functions 

Commit 073237281a ("ACPI: PM: s2idle: Enable Low-Power S0 Idle MSFT
UUID for non-AMD systems") attempted to avoid evaluating the same Low-
Power S0 Idle _DSM functions for different UUIDs, but that turns out to
be a mistake, because some systems in the field are adversely affected
by it.

Address this by allowing all Low-Power S0 Idle _DSM functions to be
evaluated, but still print the message regarding duplication of Low-
Power S0 Idle _DSM function sets for different UUIDs.

Fixes: 073237281a ("ACPI: PM: s2idle: Enable Low-Power S0 Idle MSFT UUID for non-AMD systems")
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218750
Reported-and-tested-by: Mark Pearson <mpearson@lenovo.com>
Suggested-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
This commit is contained in:
Rafael J. Wysocki 2024-04-23 21:19:36 +02:00
parent ed30a4a51b
commit 68301ef471
1 changed files with 3 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/acpi/x86/s2idle.c
View File

@ -492,16 +492,14 @@ static int lps0_device_attach(struct acpi_device *adev,
unsigned int func_mask;
/*
* Avoid evaluating the same _DSM function for two
* different UUIDs and prioritize the MSFT one.
* Log a message if the _DSM function sets for two
* different UUIDs overlap.
*/
func_mask = lps0_dsm_func_mask & lps0_dsm_func_mask_microsoft;
if (func_mask) {
if (func_mask)
acpi_handle_info(adev->handle,
"Duplicate LPS0 _DSM functions (mask: 0x%x)\n",
func_mask);
lps0_dsm_func_mask &= ~func_mask;
}
}
}