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 8EAE2BA49 for ; Tue, 7 Mar 2023 18:57:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E973DC4339B; Tue, 7 Mar 2023 18:57:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1678215435; bh=J7j/qKqoPTgsaTSLfYmXuV9CYjvnDn2SgHmEKv/79fw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rndNdQHR8dfzm7ie9IHOYOgZEQsTVJXVhmdam2uvwZbwl2JHyhC21a4+GVykPNtf+ XQp+FSYnus4dnifyrbrW7ZYgCTZPc54k6Ne+T+fQsMH2k763QRr3r0hMyll5rsonC6 gWPIHOoOfpyvHZSjktWiNrj/kbyO3ghiwEYti8As= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jonathan Cormier , Guenter Roeck , Sasha Levin Subject: [PATCH 5.15 228/567] hwmon: (ltc2945) Handle error case in ltc2945_value_store Date: Tue, 7 Mar 2023 17:59:24 +0100 Message-Id: <20230307165915.793818870@linuxfoundation.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230307165905.838066027@linuxfoundation.org> References: <20230307165905.838066027@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Jonathan Cormier [ Upstream commit 178b01eccfb0b8149682f61388400bd3d903dddc ] ltc2945_val_to_reg errors were not being handled which would have resulted in register being set to 0 (clamped) instead of being left alone. Fixes: 6700ce035f83 ("hwmon: Driver for Linear Technologies LTC2945") Signed-off-by: Jonathan Cormier Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- drivers/hwmon/ltc2945.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hwmon/ltc2945.c b/drivers/hwmon/ltc2945.c index 9adebb59f6042..c06ab7317431f 100644 --- a/drivers/hwmon/ltc2945.c +++ b/drivers/hwmon/ltc2945.c @@ -248,6 +248,8 @@ static ssize_t ltc2945_value_store(struct device *dev, /* convert to register value, then clamp and write result */ regval = ltc2945_val_to_reg(dev, reg, val); + if (regval < 0) + return regval; if (is_power_reg(reg)) { regval = clamp_val(regval, 0, 0xffffff); regbuf[0] = regval >> 16; -- 2.39.2