linux-kernel - [PATCH v2] cpufreq: amd-pstate: Let user know amd-pstate is disabled

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Date:   Thu, 23 Feb 2023 15:02:52 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     ray.huang@....com
Cc:     mario.limonciello@....com,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2] cpufreq: amd-pstate: Let user know amd-pstate is disabled

Commit 202e683df37c ("cpufreq: amd-pstate: add amd-pstate driver
parameter for mode selection") changed the driver to be disabled by
default, and this can surprise users.

Let users know what happened so they can decide what to do next.

Link: https://bugs.launchpad.net/bugs/2006942
Signed-off-by: Kai-Heng Feng <kai.heng.feng@...onical.com>
---
v2:
 - Remove redundancy in pr_info().
 - Fix spelling and URL tag.

 drivers/cpufreq/amd-pstate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c
index 45c88894fd8e..f965f54f7ae7 100644
--- a/drivers/cpufreq/amd-pstate.c
+++ b/drivers/cpufreq/amd-pstate.c
@@ -1263,7 +1263,7 @@ static int __init amd_pstate_init(void)
 	 * with amd_pstate=passive or other modes in kernel command line
 	 */
 	if (cppc_state == AMD_PSTATE_DISABLE) {
-		pr_debug("driver load is disabled, boot with specific mode to enable this\n");
+		pr_info("driver load is disabled, boot with specific mode to enable this\n");
 		return -ENODEV;
 	}
 
-- 
2.34.1