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 95E6B346FA0 for ; Sat, 28 Feb 2026 18:10:44 +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=1772302244; cv=none; b=rJxUaPbAExg3WsjM3xNRffTYeGv0h+QSzQf63t2478wNnROtNIOw6GNH/j+193g8+QYUXGFNqA15Swj/sZzNMbWSy2VviKrAHQMfKJeVHe+lBMcnWOV5dpZgJFshQiHvejHP/5qqBmRLqrbtUqS1IqxqFCvwAjxt54ndM9DjgYQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772302244; c=relaxed/simple; bh=IVwonE9Afna+HNBsS/hv0EUFzgzzUx307BKnRJmfJmw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=L5de4VGDQtoJVcBQFZZJ5/qae3bnBqfIaYaQOlsF7rCIo/jQWQSHkK8jodLGeOq5Y9FSTE7k2TU80lSn4QaYI4CnTapSHkppfO3TIBvGViJNshO9byoFD0pmBnwHo+wL5DUPhDsJjV/IPtUCI4CGBLIbc9LULXYMamHuBFVjAOg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YfZTbldU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="YfZTbldU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0549CC19425; Sat, 28 Feb 2026 18:10:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772302244; bh=IVwonE9Afna+HNBsS/hv0EUFzgzzUx307BKnRJmfJmw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YfZTbldUtXBpe3FCmW7hUPY7D3MOanAh1sWGerXBX7TREAPFHeIhN3l7F85j1J44I UPWijKd58+LXDRuqoreRpT0eqz/TauAVjKumBLifEU2ncoLNIrZtkhCJnOM6ZUatMq xLja8LgFkBv6+mkGVDOs5r1F5saVOFvY+zlPo5iAX2mhk+EDjEhRjFe/fgVgIjpQVe FVnQh8EdgYNRd4zE0u1FX7Dtp54Ft1K2fnF3h4cGW04mkmLcxkZm/0lQQ1vyuvq0IO RE1TNkLoBhsQ3f9lcqnUcVoe5ytNR+nUk6qLMtUwwPqEXonFcDu89Nwnn+dvsPV7B9 0JCxcHLhjCl/Q== From: Sasha Levin To: patches@lists.linux.dev Cc: Sean V Kelley , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 6.6 257/283] ACPI: CPPC: Fix remaining for_each_possible_cpu() to use online CPUs Date: Sat, 28 Feb 2026 13:06:39 -0500 Message-ID: <20260228180709.1583486-257-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228180709.1583486-1-sashal@kernel.org> References: <20260228180709.1583486-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Sean V Kelley [ Upstream commit 56eb0c0ed345da7815274aa821a8546a073d7e97 ] per_cpu(cpc_desc_ptr, cpu) object is initialized for only the online CPUs via acpi_soft_cpu_online() --> __acpi_processor_start() --> acpi_cppc_processor_probe(). However, send_pcc_cmd() and acpi_get_psd_map() still iterate over all possible CPUs. In acpi_get_psd_map(), encountering an offline CPU returns -EFAULT, causing cppc_cpufreq initialization to fail. This breaks systems booted with "nosmt" or "nosmt=force". Fix by using for_each_online_cpu() in both functions. Fixes: 80b8286aeec0 ("ACPI / CPPC: support for batching CPPC requests") Signed-off-by: Sean V Kelley Link: https://patch.msgid.link/20260211212254.30190-1-skelley@nvidia.com Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/cppc_acpi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c index 16ac219ae6fe5..0bf3861cf79b1 100644 --- a/drivers/acpi/cppc_acpi.c +++ b/drivers/acpi/cppc_acpi.c @@ -347,7 +347,7 @@ static int send_pcc_cmd(int pcc_ss_id, u16 cmd) end: if (cmd == CMD_WRITE) { if (unlikely(ret)) { - for_each_possible_cpu(i) { + for_each_online_cpu(i) { struct cpc_desc *desc = per_cpu(cpc_desc_ptr, i); if (!desc) @@ -509,7 +509,7 @@ int acpi_get_psd_map(unsigned int cpu, struct cppc_cpudata *cpu_data) else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY) cpu_data->shared_type = CPUFREQ_SHARED_TYPE_ANY; - for_each_possible_cpu(i) { + for_each_online_cpu(i) { if (i == cpu) continue; -- 2.51.0