From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42276 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752214AbdJSNOu (ORCPT ); Thu, 19 Oct 2017 09:14:50 -0400 Subject: Patch "mac80211: fix power saving clients handling in iwlwifi" has been added to the 4.9-stable tree To: emmanuel.grumbach@intel.com, alexander.levin@verizon.com, gregkh@linuxfoundation.org, johannes.berg@intel.com Cc: , From: Date: Thu, 19 Oct 2017 15:14:26 +0200 Message-ID: <1508418866109113@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 mac80211: fix power saving clients handling in iwlwifi to the 4.9-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: mac80211-fix-power-saving-clients-handling-in-iwlwifi.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From foo@baz Thu Oct 19 15:04:02 CEST 2017 From: Emmanuel Grumbach Date: Mon, 20 Feb 2017 14:24:36 +0100 Subject: mac80211: fix power saving clients handling in iwlwifi From: Emmanuel Grumbach [ Upstream commit d98937f4ea713d21e0fcc345919f86c877dd8d6f ] iwlwifi now supports RSS and can't let mac80211 track the PS state based on the Rx frames since they can come out of order. iwlwifi is now advertising AP_LINK_PS, and uses explicit notifications to teach mac80211 about the PS state of the stations and the PS poll / uAPSD trigger frames coming our way from the peers. Because of that, the TIM stopped being maintained in mac80211. I tried to fix this in commit c68df2e7be0c ("mac80211: allow using AP_LINK_PS with mac80211-generated TIM IE") but that was later reverted by Felix in commit 6c18a6b4e799 ("Revert "mac80211: allow using AP_LINK_PS with mac80211-generated TIM IE") since it broke drivers that do not implement set_tim. Since none of the drivers that set AP_LINK_PS have the set_tim() handler set besides iwlwifi, I can bail out in __sta_info_recalc_tim if AP_LINK_PS AND .set_tim is not implemented. Signed-off-by: Emmanuel Grumbach Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- net/mac80211/sta_info.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -688,7 +688,7 @@ static void __sta_info_recalc_tim(struct } /* No need to do anything if the driver does all */ - if (ieee80211_hw_check(&local->hw, AP_LINK_PS)) + if (ieee80211_hw_check(&local->hw, AP_LINK_PS) && !local->ops->set_tim) return; if (sta->dead) Patches currently in stable-queue which might be from emmanuel.grumbach@intel.com are queue-4.9/mac80211-fix-power-saving-clients-handling-in-iwlwifi.patch