From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0834E235358; Sat, 12 Sep 2026 07:53:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789199591; cv=none; b=Na10KvjZxdYE9wBhjKGxOzXt3IcHnq9WSD/4Yr/BjrQoTGjjH83xzQYIg/H2plTCFwsm55kweHHsk631/hP6CXWq4q7ZdVF9IqBE6YvxfM5SAoHC5vSeccVsWJtgy/MdLGnvSV8kZ8aWkGoR1139QaxL8ELjiIII0R8pCIBX0Es= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789199591; c=relaxed/simple; bh=s5wJRNZ0ZoIAUJRrwRtt8TCszuV5pgtGuZg7SbxVRGQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=myMkUrLXTTBtE07n1tRUIa/ybJOWJLjcGGHNtyWOdL1lj+9o7k/ffW9WRQsBvIycESB1VV2uTh7rgfy+89P54jfANR1qDJGp2xMwDk/Iih+BXnaf0VWwegXmsiIvdCHg4sQiMbYm0s9PuGA1BOV656iOhursCx1NRcsnd/vms4k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Xu8gLofg; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Xu8gLofg" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 25B261F000FF; Sat, 12 Sep 2026 07:53:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789199589; bh=Wdkib9pmmzdPqVmGoMW+8stN+zNPtpLAQZFI+ex486c=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Xu8gLofgHo6NFkH7R/rRGvy9fe5KFq83k83WEK4Pkhu5uOcOglmDzGfmJj/HyATcU VOjMO7VvMsCyn5EnAP9ODcc2TiHcT9yDLHh54Mj0daZQrScAFV0lhVgEkXDCpUkoE6 VFu1mjVpXWqubJr5jot5XbrMLAjbzirTBnUWx184= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Li Xiong , Xibo Wang , Qianheng Peng , Zhongqiu Han , Mario Limonciello , Sasha Levin Subject: [PATCH 7.2 0616/1815] cpufreq: amd-pstate-ut: Skip tests when amd-pstate driver is not active Date: Sat, 12 Sep 2026 08:39:26 +0200 Message-ID: <20260912065703.342977985@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065648.999753832@linuxfoundation.org> References: <20260912065648.999753832@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qianheng Peng [ Upstream commit 8d31bb1451643f328db0cea0e21e63ef54b4faf2 ] The crash issue may occur when modprobe amd_pstate_ut on intel platform. amd_pstate_ut: 1 amd_pstate_ut_acpi_cpc_valid success! amd_pstate_ut: 2 amd_pstate_ut_check_enabled success! BUG: kernel NULL pointer dereference, address: 0000000000000080 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] SMP NOPTI CPU: 0 PID: 20300 Comm: modprobe Kdump: loaded Tainted: G O 6.6.0-0010.rc1.ctl4.x86_64 #1 Hardware name: FiberHome R2200 V5/Xeon Boards, BIOS 3.1a 02/24/2020 RIP: 0010:amd_pstate_ut_check_perf+0x141/0x280 [amd_pstate_ut] Call Trace: amd_pstate_ut_init+0x1b/0xff0 [amd_pstate_ut] ? __pfx_amd_pstate_ut_init+0x10/0x10 [amd_pstate_ut] do_one_initcall+0x42/0x2e0 ? kmalloc_trace+0x26/0x90 do_init_module+0x60/0x240 __se_sys_init_module+0x185/0x1c0 do_syscall_64+0x62/0x190 entry_SYSCALL_64_after_hwframe+0x76/0x7e Add state detection to amd pstate driver to prevent amd_pstate_ut driver from testing on non-AMD platforms. Fixes: 14eb1c96e3a3 ("cpufreq: amd-pstate: Add test module for amd-pstate driver") Suggested-by: Li Xiong Suggested-by: Xibo Wang Signed-off-by: Qianheng Peng Reviewed-by: Zhongqiu Han Link: https://lore.kernel.org/r/1784191899-28957-1-git-send-email-pengqh1@chinatelecom.cn (ML: adjust title) Signed-off-by: Mario Limonciello Signed-off-by: Sasha Levin --- drivers/cpufreq/amd-pstate-ut.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/cpufreq/amd-pstate-ut.c b/drivers/cpufreq/amd-pstate-ut.c index 735b29f76438a..2142838ad6cc4 100644 --- a/drivers/cpufreq/amd-pstate-ut.c +++ b/drivers/cpufreq/amd-pstate-ut.c @@ -560,6 +560,11 @@ static int amd_pstate_ut_check_freq_attrs(u32 index) static int __init amd_pstate_ut_init(void) { u32 i = 0, arr_size = ARRAY_SIZE(amd_pstate_ut_cases); + enum amd_pstate_mode mode = amd_pstate_get_status(); + + /* don't test if no running amd-pstate driver */ + if (mode == AMD_PSTATE_UNDEFINED || mode == AMD_PSTATE_DISABLE) + return -EOPNOTSUPP; for (i = 0; i < arr_size; i++) { int ret; -- 2.53.0