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Sat, 3 Mar 2018 19:06:16 -0500 Received: from mail-bn3nam01on0111.outbound.protection.outlook.com ([104.47.33.111]:54931 "EHLO NAM01-BN3-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933626AbeCCWbN (ORCPT ); Sat, 3 Mar 2018 17:31:13 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Mohammed Shafi Shajakhan , Kalle Valo , Sasha Levin Subject: [PATCH AUTOSEL for 4.9 017/219] ath10k: fix a warning during channel switch with multiple vaps Thread-Topic: [PATCH AUTOSEL for 4.9 017/219] ath10k: fix a warning during channel switch with multiple vaps Thread-Index: AQHTsz7lPIobGbjG+kO+5AlwuwG/9Q== Date: Sat, 3 Mar 2018 22:28:05 +0000 Message-ID: <20180303222716.26640-17-alexander.levin@microsoft.com> References: <20180303222716.26640-1-alexander.levin@microsoft.com> In-Reply-To: <20180303222716.26640-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;MW2PR2101MB0970;7:9aNxgZv3Ng8OHHxUyxWsvuNcrHOXxsqEMbTloGyxe4itI6x8gdqex5eSa8I+AAU5afg1sOEsFFy+COmsmiOi8y/o9d81kt8TyNXSj2iNRdVGw4fDGwXQk0IJUgCU0xc+hkGr/rMb4IxsBR17Jf+aze18RVbsvmEWI6EXsYJ5+pb43jSNsqxhrMBi4MKXvTVmzjwuyHUksOayZEJGd2CK6J4ecprZnXS4Awi6ogMGtK01ImEMX9U568zEjd0jop04 x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: e751eb6c-ba02-46f3-b909-08d581567515 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(48565401081)(5600026)(4604075)(3008032)(2017052603307)(7193020);SRVR:MW2PR2101MB0970; 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x-microsoft-antispam-message-info: AhdLrBht1j7PXhLXpwm5MlERdx9zoyM4RFaq9OmcAX+CyDUgOq32gw/2Ahh0BrbcA78oJhZbIpcmJYeBJxh9qU5OKmVJBJPIgRDcmZgkR3iEcen7e6c0BDyp5V5rDAXhENTHprUF64pnrU19RfAFPpb+Epni75fBC+u9X9hkjd0= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: e751eb6c-ba02-46f3-b909-08d581567515 X-MS-Exchange-CrossTenant-originalarrivaltime: 03 Mar 2018 22:28:05.2600 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR2101MB0970 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Mohammed Shafi Shajakhan [ Upstream commit c73f8c00330f59ce9b1ace9ff698aca83390d358 ] Doing a channel switch via hostapd_cli seems to update the new channel context for each VAP's appropriately as below in 'ath10k_mac_update_vif_chan', hence we can safely suppress the warning that shows up during this operation and dump the warning only if no vaps are available for channel switch hostapd_cli -i wlan0 chan_switch 5 5200 OK ath10k_pci : mac chanctx switch n_vifs 3 mode 1 ath10k_pci : mac chanctx switch vdev_id 2 freq 5180->5200 width 0->0 ath10k_pci : mac chanctx switch vdev_id 1 freq 5180->5200 width 0->0 ath10k_pci : mac chanctx switch vdev_id 0 freq 5180->5200 width 0->0 Call Trace: WARNING: backports-20161201-3.14.77-9ab3068/drivers/net/wireless/ath/ath10k= /mac.c:7126 [] (warn_slowpath_null) from [] (ath10k_reconfig_complete+0xe4/0x25c [ath10k_core]) [] (ath10k_reconfig_complete [ath10k_core]) [] (ath10k_mac_vif_ap_csa_work+0x214/0x370 [ath10k_core]) [] (ath10k_mac_op_change_chanctx+0x108/0x128 [ath10k_core]) [] (ieee80211_recalc_chanctx_min_def+0x30c/0x430 [mac80211]) [] (ieee80211_recalc_smps_chanctx+0x2ec/0x840 [mac80211]) [] (ieee80211_vif_use_reserved_context+0x7c/0xf8 [mac80211]) [] (ieee80211_vif_use_reserved_context [mac80211]) [] (ieee80211_csa_finalize_work+0x5c/0x88 [mac80211]) Fixes: d7bf4b4aba05 ("ath10k: fix ar->rx_channel updating logic") Signed-off-by: Mohammed Shafi Shajakhan Signed-off-by: Kalle Valo Signed-off-by: Sasha Levin --- drivers/net/wireless/ath/ath10k/mac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/a= th/ath10k/mac.c index 17ab8efdac35..696b90270615 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -7070,7 +7070,7 @@ ath10k_mac_update_rx_channel(struct ath10k *ar, lockdep_assert_held(&ar->data_lock); =20 WARN_ON(ctx && vifs); - WARN_ON(vifs && n_vifs !=3D 1); + WARN_ON(vifs && !n_vifs); =20 /* FIXME: Sort of an optimization and a workaround. Peers and vifs are * on a linked list now. Doing a lookup peer -> vif -> chanctx for each --=20 2.14.1