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 F0CDE43F4B8; Tue, 21 Jul 2026 21:59:58 +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=1784671200; cv=none; b=AyT9EqdPUgTosgjYk0XILTcCiCzJn+HDs+vBZQIoFCEDRGC3ELF96ufreguS2/YgGOdYSEureaqQdMpipabk7ghai+XFnnMzbEEHrZDhT+b216SP0fLa+CztBKZUj2/GO5WD+fxsUQC1YJK2Zrcsl12LtCt3bmUyUPrqbWK8cxg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784671200; c=relaxed/simple; bh=cN9+KaLudCbHvzxCcoogjzwFddzIfLPpJHo6chwXvxI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=lq4J2fP6U24mahQM9wTzkdM9x+9fqf1R8ImSoFR7luL/XKDq66/P47bGZ960sonWzwnqmAISoBQEacE7wU3hEvOiwfRuRjvMsJkfg5YN5OHsZja1OH9ltnJaRvvLYPQdUGlx+BP3FRQ+n+IG9YlwKvKkybxOAYoEU57lhe8hNJc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Br7Be5nD; 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="Br7Be5nD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 626FC1F000E9; Tue, 21 Jul 2026 21:59:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784671198; bh=BRo2erlaiXkBSFRYOb/nVYrTldg0/b6unKtAkgwiIfI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Br7Be5nDXvwblX9vxY9ubFi7iAS71adMSNyUBXwCjgDENLoqkwn+LJC2nUCJsgma3 Wj+y4Txrhe/c0+brs3i60hqnAuWc6zP/Cs+kSumU59ezGMnkj70NKTY4UXHNYzyD1+ bQlEo9ZaSmfwNnLV1i1UBWA8YC17sqE9Vr/c2Tvg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Liviu Stan , Stable@vger.kernel.org, Jonathan Cameron , Sasha Levin Subject: [PATCH 5.15 155/843] iio: temperature: ltc2983: Fix n_wires default bypassing rotation check Date: Tue, 21 Jul 2026 17:16:30 +0200 Message-ID: <20260721152409.500173368@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152405.946368001@linuxfoundation.org> References: <20260721152405.946368001@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Liviu Stan [ Upstream commit 434c150752675f44dc52c384a7fa22e5176bc35a ] When adi,number-of-wires is absent, n_wires is left at 0. The binding documents a default of 2 wires, matching the hardware default. However the current-rotate validation checks n_wires == 2 || n_wires == 3, so with n_wires = 0 the guard is bypassed and adi,current-rotate is accepted for a 2-wire RTD. Initialize n_wires = 2 to match the binding default and ensure the rotation check fires correctly when the property is absent. Fixes: f110f3188e56 ("iio: temperature: Add support for LTC2983") Signed-off-by: Liviu Stan Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Liviu Stan Signed-off-by: Sasha Levin --- drivers/iio/temperature/ltc2983.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/temperature/ltc2983.c b/drivers/iio/temperature/ltc2983.c index ecc8b2e129b896..c6748cfc5d5ce2 100644 --- a/drivers/iio/temperature/ltc2983.c +++ b/drivers/iio/temperature/ltc2983.c @@ -697,7 +697,7 @@ static struct ltc2983_sensor *ltc2983_rtd_new(const struct device_node *child, int ret = 0; struct device *dev = &st->spi->dev; struct device_node *phandle; - u32 excitation_current = 0, n_wires = 0; + u32 excitation_current = 0, n_wires = 2; rtd = devm_kzalloc(dev, sizeof(*rtd), GFP_KERNEL); if (!rtd) -- 2.53.0