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ACPI: x86: s2idle: Fix a logic error parsing AMD constraints table 

[ Upstream commit 9cc8cd086f ]

The constraints table should be resetting the `list` object
after running through all of `info_obj` iterations.

This adjusts whitespace as well as less code will now be included
with each loop. This fixes a functional problem is fixed where a
badly formed package in the inner loop may have incorrect data.

Fixes: 146f1ed852 ("ACPI: PM: s2idle: Add AMD support to handle _DSM")
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mario Limonciello 2023-08-18 14:40:04 -05:00 committed by Greg Kroah-Hartman
parent a99f32b81c
commit 7c70932568
1 changed files with 16 additions and 23 deletions
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39
drivers/acpi/x86/s2idle.c
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@ -128,12 +128,11 @@ static void lpi_device_get_constraints_amd(void)
struct lpi_constraints *list;
acpi_status status;
list = &lpi_constraints_table[lpi_constraints_table_size];
for (k = 0; k < info_obj->package.count; k++) {
union acpi_object *obj = &info_obj->package.elements[k];
list = &lpi_constraints_table[lpi_constraints_table_size];
list->min_dstate = -1;
switch (k) {
case 0:
dev_info.enabled = obj->integer.value;
@ -148,27 +147,21 @@ static void lpi_device_get_constraints_amd(void)
dev_info.min_dstate = obj->integer.value;
break;
}
if (!dev_info.enabled || !dev_info.name ||
!dev_info.min_dstate)
continue;
status = acpi_get_handle(NULL, dev_info.name,
&list->handle);
if (ACPI_FAILURE(status))
continue;
acpi_handle_debug(lps0_device_handle,
"Name:%s\n", dev_info.name);
list->min_dstate = dev_info.min_dstate;
if (list->min_dstate < 0) {
acpi_handle_debug(lps0_device_handle,
"Incomplete constraint defined\n");
continue;
}
}
if (!dev_info.enabled || !dev_info.name ||
!dev_info.min_dstate)
continue;
status = acpi_get_handle(NULL, dev_info.name, &list->handle);
if (ACPI_FAILURE(status))
continue;
acpi_handle_debug(lps0_device_handle,
"Name:%s\n", dev_info.name);
list->min_dstate = dev_info.min_dstate;
lpi_constraints_table_size++;
}
}