From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:39442 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932274AbcI0PFV (ORCPT ); Tue, 27 Sep 2016 11:05:21 -0400 Subject: Patch "i2c: mux: pca954x: retry updating the mux selection on failure" has been added to the 4.7-stable tree To: peda@axentia.se, gregkh@linuxfoundation.org, wsa@the-dreams.de Cc: , From: Date: Tue, 27 Sep 2016 17:04:53 +0200 Message-ID: <1474988693114228@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled i2c: mux: pca954x: retry updating the mux selection on failure to the 4.7-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: i2c-mux-pca954x-retry-updating-the-mux-selection-on-failure.patch and it can be found in the queue-4.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 463e8f845cbf1c01e4cc8aeef1703212991d8e1e Mon Sep 17 00:00:00 2001 From: Peter Rosin Date: Wed, 14 Sep 2016 15:24:12 +0200 Subject: i2c: mux: pca954x: retry updating the mux selection on failure From: Peter Rosin commit 463e8f845cbf1c01e4cc8aeef1703212991d8e1e upstream. The cached value of the last selected channel prevents retries on the next call, even on failure to update the selected channel. Fix that. Signed-off-by: Peter Rosin Signed-off-by: Wolfram Sang Signed-off-by: Greg Kroah-Hartman --- drivers/i2c/muxes/i2c-mux-pca954x.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/i2c/muxes/i2c-mux-pca954x.c +++ b/drivers/i2c/muxes/i2c-mux-pca954x.c @@ -164,7 +164,7 @@ static int pca954x_select_chan(struct i2 /* Only select the channel if its different from the last channel */ if (data->last_chan != regval) { ret = pca954x_reg_write(muxc->parent, client, regval); - data->last_chan = regval; + data->last_chan = ret ? 0 : regval; } return ret; Patches currently in stable-queue which might be from peda@axentia.se are queue-4.7/i2c-mux-pca954x-retry-updating-the-mux-selection-on-failure.patch