From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936773AbeE1KMi (ORCPT ); Mon, 28 May 2018 06:12:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:60690 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936748AbeE1KMe (ORCPT ); Mon, 28 May 2018 06:12:34 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Guenter Roeck , Sasha Levin Subject: [PATCH 3.18 155/185] hwmon: (pmbus/adm1275) Accept negative page register values Date: Mon, 28 May 2018 12:03:16 +0200 Message-Id: <20180528100110.620532108@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180528100050.700971285@linuxfoundation.org> References: <20180528100050.700971285@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Guenter Roeck [ Upstream commit ecb29abd4cb0670c616fb563a078f25d777ce530 ] A negative page register value means that no page needs to be selected. This is used by status register read operations and needs to be accepted. The failure to do so so results in missed status and limit registers. Fixes: da8e48ab483e1 ("hwmon: (pmbus) Always call _pmbus_read_byte in core driver") Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/hwmon/pmbus/adm1275.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/hwmon/pmbus/adm1275.c +++ b/drivers/hwmon/pmbus/adm1275.c @@ -67,7 +67,7 @@ static int adm1275_read_word_data(struct const struct adm1275_data *data = to_adm1275_data(info); int ret = 0; - if (page) + if (page > 0) return -ENXIO; switch (reg) { @@ -144,7 +144,7 @@ static int adm1275_write_word_data(struc { int ret; - if (page) + if (page > 0) return -ENXIO; switch (reg) {