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 77C8C48A2A4; Sat, 28 Feb 2026 17:34:05 +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=1772300045; cv=none; b=hFL9oXZW+UdQjIKSJ9ItB3hry6VO/PBP2kHJ9cmxuEmMZ35pt9kQKnn72lHdJNH0Dastz5t3t2tRcV7XGyudvVbNH69xFO/LrAnYUOn2kQQ+KUPqYyAFoOnepMmLh5+AWBXQ13K8c35/Ee0wfBpjRief3Y3JstenECJg5Ck92qY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772300045; c=relaxed/simple; bh=ANDSCPHjokIvXexJoyEmdLJh4bwF/OZdktQa/MDY09o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=f8duuelZknw/FNOF/VFirDs9+Tkx01WBaKUS3pA54bFduVEwRMB/VVwBAAs4W0Qg75l14ozI5x3t3FZrKPp8BezZQov7F0IKAyVkpIAP3xAHyJNhmjmY7DUHedLcF6PUm8fCJn5jrgQSMaTc7VVJU8xpcrU4a+rbEergq1t7k/4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=s/ECMo8Y; 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="s/ECMo8Y" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C14EBC2BCB1; Sat, 28 Feb 2026 17:34:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772300045; bh=ANDSCPHjokIvXexJoyEmdLJh4bwF/OZdktQa/MDY09o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s/ECMo8YVhM/ApM505rgK3WiCek+A+yyboxYdo72pbK08aUEyzh7U+1WUTEjV+pAe XNxNunKgIEWR90M8wC1qKr/vWb8D0SOXURcue9/XwLb1t+0jP8betzMr2eshBW6edr adaO3o75l/NWZqASC3GjaWys0jzpvlMsnPVQ/+xXYVfO9gRelRwVfltLQqteW4XZg1 7XNNINvmPY2Uh+r5+ajn3xf2gFtvigc4d74LWVb5UGqPJf62eY1pzs/Rtteq7xGl7Y uvKwv2gL43KwR/OIgs1td2OEgEa/5zfvwWNJzTXRnBa1MOtCzG7X4pKYAf+oHdIPMD XBX1xOPIpp64Q== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kaushlendra Kumar , Shuah Khan , Sasha Levin Subject: [PATCH 6.19 058/844] tools/power cpupower: Reset errno before strtoull() Date: Sat, 28 Feb 2026 12:19:31 -0500 Message-ID: <20260228173244.1509663-59-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228173244.1509663-1-sashal@kernel.org> References: <20260228173244.1509663-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Kaushlendra Kumar [ Upstream commit f9bd3762cf1bd0c2465f2e6121b340883471d1bf ] cpuidle_state_get_one_value() never cleared errno before calling strtoull(), so a prior ERANGE caused every cpuidle counter read to return zero. Reset errno to 0 before the conversion so each sysfs read is evaluated independently. Link: https://lore.kernel.org/r/20251201121745.3776703-1-kaushlendra.kumar@intel.com Signed-off-by: Kaushlendra Kumar Signed-off-by: Shuah Khan Signed-off-by: Sasha Levin --- tools/power/cpupower/lib/cpuidle.c | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/power/cpupower/lib/cpuidle.c b/tools/power/cpupower/lib/cpuidle.c index f2c1139adf716..bd857ee7541a7 100644 --- a/tools/power/cpupower/lib/cpuidle.c +++ b/tools/power/cpupower/lib/cpuidle.c @@ -150,6 +150,7 @@ unsigned long long cpuidle_state_get_one_value(unsigned int cpu, if (len == 0) return 0; + errno = 0; value = strtoull(linebuf, &endp, 0); if (endp == linebuf || errno == ERANGE) -- 2.51.0