From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 681CD245017 for ; Thu, 17 Apr 2025 13:29:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744896569; cv=none; b=CYLzdzn24brCjyUfHs/QJ7HjJWq7rpypyYitid1hBxDetZ1YaxwOBIXPjr6v46ud6LyjxfqLU3qx3LGLEPou/sE5isljEkGmZcEr38Ll+Rhuew4nVxn4LC7sfQTcJgidthqgblM98rLPNNLDH32PDEgq61tiY3gVOzzV4vZqdDk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744896569; c=relaxed/simple; bh=hM8a6N80vL8oOhVtU+Y8BcEDZHSZbEHpZLvuSd69tYM=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=HulH3dVha/iMWrT7wGdieOrRophKohpMLbjvNFfaCzRsuv9bKBfxoNUMQzYOEnVyohZw8qN1SWmaSP6FzNPw+uR30jLtnrokHwoVvdZSmNbtjj76fx8WAdA3vtuVTqvlgh2pKWxZodDnFdABhKKLq/Ke6fDPxO+t1obkH76i3yg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=LalXT58W; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="LalXT58W" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6E86BC4CEE4; Thu, 17 Apr 2025 13:29:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1744896568; bh=hM8a6N80vL8oOhVtU+Y8BcEDZHSZbEHpZLvuSd69tYM=; h=Subject:To:Cc:From:Date:From; b=LalXT58WFOQUUYLc3+sLhlhCLLuZNtaiVubZCXMLdcB6ccDJ8nBJwQSsuLfMRPkPd YL49y/quhvAP/OpyqoNX5h+xXfORoLDfROFycKg+WBU0KOqApCkIxPu1LrLZwBXLkG fBFdcoGG9CAkGc5nnhJAbKnxrwilNUTm8CFaJSFw= Subject: FAILED: patch "[PATCH] cpufreq: Reference count policy in cpufreq_update_limits()" failed to apply to 5.15-stable tree To: rafael.j.wysocki@intel.com,marmarek@invisiblethingslab.com,stable@vger.kernel.org,viresh.kumar@linaro.org Cc: From: Date: Thu, 17 Apr 2025 15:28:17 +0200 Message-ID: <2025041717-parrot-computing-a78a@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 9e4e249018d208678888bdf22f6b652728106528 # git commit -s git send-email --to '' --in-reply-to '2025041717-parrot-computing-a78a@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 9e4e249018d208678888bdf22f6b652728106528 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Fri, 28 Mar 2025 21:39:08 +0100 Subject: [PATCH] cpufreq: Reference count policy in cpufreq_update_limits() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Since acpi_processor_notify() can be called before registering a cpufreq driver or even in cases when a cpufreq driver is not registered at all, cpufreq_update_limits() needs to check if a cpufreq driver is present and prevent it from being unregistered. For this purpose, make it call cpufreq_cpu_get() to obtain a cpufreq policy pointer for the given CPU and reference count the corresponding policy object, if present. Fixes: 5a25e3f7cc53 ("cpufreq: intel_pstate: Driver-specific handling of _PPC updates") Closes: https://lore.kernel.org/linux-acpi/Z-ShAR59cTow0KcR@mail-itl Reported-by: Marek Marczykowski-Górecki Cc: All applicable Signed-off-by: Rafael J. Wysocki Acked-by: Viresh Kumar Link: https://patch.msgid.link/1928789.tdWV9SEqCh@rjwysocki.net diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 0cf5a320bb5e..3841c9da6cac 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2809,6 +2809,12 @@ EXPORT_SYMBOL(cpufreq_update_policy); */ void cpufreq_update_limits(unsigned int cpu) { + struct cpufreq_policy *policy __free(put_cpufreq_policy); + + policy = cpufreq_cpu_get(cpu); + if (!policy) + return; + if (cpufreq_driver->update_limits) cpufreq_driver->update_limits(cpu); else