The patch fixs the osc_sb_cppc_not_supported variable checking
Otherwise the cppc acpi driver will be failed to register causing AMD
pstate driver failed to load when calling acpi_cpc_valid()
Fixes: c42fa24b447("ACPI: bus: Avoid using CPPC if not supported by firmware")
Signed-off-by: Perry Yuan <Perry.Yuan@xxxxxxx>
---
drivers/acpi/bus.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 4d7c51a33b01..9731e4a1e338 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -359,7 +359,7 @@ static void acpi_bus_osc_negotiate_platform_control(void)
}
#ifdef CONFIG_ACPI_CPPC_LIB
- osc_sb_cppc_not_supported = !(capbuf_ret[OSC_SUPPORT_DWORD] &
+ osc_sb_cppc_not_supported = !(capbuf_ret[OSC_SUPPORT_DWORD] &&
(OSC_SB_CPC_SUPPORT | OSC_SB_CPCV2_SUPPORT));
#endif
--
2.25.1
