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 794C5225D9; Sun, 1 Sep 2024 17:00:24 +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=1725210024; cv=none; b=bBiWTRZQsIXTO0jhwAN4OeYvyzHF+ggWxc5JB6zOueDnLPuULxbulNK1hDYlZ9/IoDSxzeX2pZrIHsDIy1nUDzmfNQdk/rxqrR7QzW0a8tAbTZkBW+XDW32J3AsHbxqtOb/rsL1Uh5O3+PLnOv3LGh7zLW8spNXzEPy+trKTPlY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725210024; c=relaxed/simple; bh=lC/aUdU5V5g6gs+iTRJ6vZ5mJ6bqsKzYL88YniNqsA4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Y2Dq2koOsul6q0XZEY3lTjkoPMop2BsFTPNweypyr5K/3/6IUktj1w8CmyRblT+hPwdr5cSCJX0bWPAy0IMH7K/5qVT3aAyS8B5I5G9z+aj8n53JVUM4GpdJdZ9ZR8yNqUwrw8Rj/cHXm4V4OBvtkpHly84AE35wpgoDG8qQpac= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=V8ZW/1oJ; 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="V8ZW/1oJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93C5FC4CEC3; Sun, 1 Sep 2024 17:00:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1725210024; bh=lC/aUdU5V5g6gs+iTRJ6vZ5mJ6bqsKzYL88YniNqsA4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=V8ZW/1oJfhwPKg7ao8SsGIwxDdqjzVTTuoVypW5mNxLgMPbjAuXxtCzrsTCShW8r6 c+DefJ/gHkESueW+7einZdCigSiTCufQ9h13oOIHqsyhJfCdbiMmeLWwLIgxHlPtUR HqrjNqRHONAbUNOOEY2e1hjV14tTRGMrHcgGARXI= 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 5.15 063/215] hwmon: (ltc2992) Avoid division by zero Date: Sun, 1 Sep 2024 18:16:15 +0200 Message-ID: <20240901160825.736809930@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240901160823.230213148@linuxfoundation.org> References: <20240901160823.230213148@linuxfoundation.org> User-Agent: quilt/0.67 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: 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 009a0a5af9236..a657f93882dd1 100644 --- a/drivers/hwmon/ltc2992.c +++ b/drivers/hwmon/ltc2992.c @@ -912,8 +912,12 @@ 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