From: Perry Yuan <Perry.Yuan@amd.com>
To: <Ray.Huang@amd.com>, <Mario.Limonciello@amd.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Len Brown <lenb@kernel.org>, Huang Rui <ray.huang@amd.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
<linux-acpi@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Cc: <Nathan.Fontenot@amd.com>, <Jinzhou.Su@amd.com>,
<Xinmei.Huang@amd.com>, <Xiaojian.Du@amd.com>, <Li.Meng@amd.com>,
<linux-pm@vger.kernel.org>, "Perry Yuan" <Perry.Yuan@amd.com>
Subject: [PATCH] ACPI: bus: Fix osc_sb_cppc_not_supported check
Date: Fri, 24 Jun 2022 07:59:40 -0400 [thread overview]
Message-ID: <20220624115940.272422-1-Perry.Yuan@amd.com> (raw)
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@amd.com>
---
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
next reply other threads:[~2022-06-24 12:00 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-24 11:59 Perry Yuan [this message]
2022-06-24 16:11 ` Rafael J. Wysocki
2022-06-24 17:56 ` Yuan, Perry
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