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 E7F3844C8C; Tue, 27 Aug 2024 14:48:33 +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=1724770114; cv=none; b=O0RDJMu1TKwBo5a6uvYySV9Eoo4+1vXcSWFL4mwpZLIPrRkwyEEDxea4AR7WFYVIXyWMYfeHIA9HuSo2xdlvThNn89Al/HDoYstvEM18iOTEZrHPN+IkS8DaoUUvWv3WLyOUX8+IlXmvR8xnKkGue/K8/KKEh4M8UWxxDxcRQTk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724770114; c=relaxed/simple; bh=4Pw4AyynVktEPN8UyBDtPGjShlFiLD84AfybzLDKdok=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PrIPcNiNpqPM/hK4nYOHrJt0N9oEF1Nqmm2DmbA5yDQhgk15YGLfYp4T1tvokyal4Ppa3khWwd6eiF4WXlC/DtTXYG9RU61XS0pS7iX6VRfEvGvia+Bu85NUPy8WvobiQQAu/GDft4dgTLqeN+yDgKMFVzgeD0r7yWsmOBmrvmM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=e+9gAGSS; 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="e+9gAGSS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 68204C61047; Tue, 27 Aug 2024 14:48:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1724770113; bh=4Pw4AyynVktEPN8UyBDtPGjShlFiLD84AfybzLDKdok=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e+9gAGSS7im5ekZIFW0mLv63In7nfHt4EgxjW5RsiluXJUDhuJi05Ich+paBYFvvK ID3uJVsYO0/zjIuFvhmebxntgzG6rIVS2PRHtW2hdW6rhcrtlHuvNx8tXjt7aZwPJY lfTQZCI2xpRhu41d2k+lgpkMG2PS5o9hzGL1Ovuw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Antoniu Miclaus , Guenter Roeck , Sasha Levin Subject: [PATCH 6.6 132/341] hwmon: (ltc2992) Avoid division by zero Date: Tue, 27 Aug 2024 16:36:03 +0200 Message-ID: <20240827143848.441700084@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240827143843.399359062@linuxfoundation.org> References: <20240827143843.399359062@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Antoniu Miclaus [ Upstream commit 10b02902048737f376104bc69e5212466e65a542 ] Do not allow setting shunt resistor to 0. This results in a division by zero when performing current value computations based on input voltages and connected resistor values. Signed-off-by: Antoniu Miclaus Link: https://lore.kernel.org/r/20231011135754.13508-1-antoniu.miclaus@analog.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- drivers/hwmon/ltc2992.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/ltc2992.c b/drivers/hwmon/ltc2992.c index 589bcd07ce7f7..001799bc28ed6 100644 --- a/drivers/hwmon/ltc2992.c +++ b/drivers/hwmon/ltc2992.c @@ -875,8 +875,12 @@ static int ltc2992_parse_dt(struct ltc2992_state *st) } ret = fwnode_property_read_u32(child, "shunt-resistor-micro-ohms", &val); - if (!ret) + if (!ret) { + if (!val) + return dev_err_probe(&st->client->dev, -EINVAL, + "shunt resistor value cannot be zero\n"); st->r_sense_uohm[addr] = val; + } } return 0; -- 2.43.0