Return-path: Received: from mail-we0-f169.google.com ([74.125.82.169]:40839 "EHLO mail-we0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932295AbaAWTL4 (ORCPT ); Thu, 23 Jan 2014 14:11:56 -0500 Received: by mail-we0-f169.google.com with SMTP id u57so1704859wes.28 for ; Thu, 23 Jan 2014 11:11:55 -0800 (PST) Message-ID: <52E16978.3040602@gmail.com> (sfid-20140123_201206_714657_9B5CC91B) Date: Thu, 23 Jan 2014 21:11:52 +0200 From: Emmanuel Grumbach MIME-Version: 1.0 To: "Grumbach, Emmanuel" , Petko Manolov CC: "linux-wireless@vger.kernel.org" , "ilw@linux.intel.com" , "Berg, Johannes" Subject: Re: iwlwifi crash with 3.13 References: <20140123091659.GE9077@localhost> <0BA3FCBA62E2DC44AF3030971E174FB303D56D70@HASMSX103.ger.corp.intel.com> <20140123123125.GA3424@localhost> <0BA3FCBA62E2DC44AF3030971E174FB303D57045@HASMSX103.ger.corp.intel.com> In-Reply-To: <0BA3FCBA62E2DC44AF3030971E174FB303D57045@HASMSX103.ger.corp.intel.com> Content-Type: multipart/mixed; boundary="------------080204090707000405030806" Sender: linux-wireless-owner@vger.kernel.org List-ID: This is a multi-part message in MIME format. --------------080204090707000405030806 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Ok - I put the pieces together: > iwlwifi 0000:01:00.0: loaded firmware version 22.15.8.0 op_mode iwlmvm > iwlwifi 0000:01:00.0: Detected Intel(R) Wireless N 7260, REV=0x144 This means that your NIC is 2.4GHz only. Dual band NICs print something else. Now here come the catch. You seem to have an "old" NIC in a way that the NVM (EEPROM like) is old. In that NVM, there was a bug that advertised the A band channels but disabled the A band in SKU cap. Can you please try the patch attached? I will prevent the driver from trying to work on A band while the HW doesn't allow. emmanuel --------------080204090707000405030806 Content-Type: text/x-patch; name="0001-iwlwifi-mvm-don-t-allow-A-band-if-SKU-forbids-it.patch" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename*0="0001-iwlwifi-mvm-don-t-allow-A-band-if-SKU-forbids-it.patch" >From dd40219d34426e4f9c7d1b10653ece3dc67588c5 Mon Sep 17 00:00:00 2001 From: Emmanuel Grumbach Date: Thu, 5 Dec 2013 22:42:55 +0200 Subject: [PATCH] iwlwifi: mvm: don't allow A band if SKU forbids it Change-Id: I920b7c53dc05a41de43ab9762eb7853dc4bed1ed Signed-off-by: Emmanuel Grumbach --- drivers/net/wireless/iwlwifi/iwl-nvm-parse.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/wireless/iwlwifi/iwl-nvm-parse.c b/drivers/net/wireless/iwlwifi/iwl-nvm-parse.c index 1fce0ec..9600afc 100644 --- a/drivers/net/wireless/iwlwifi/iwl-nvm-parse.c +++ b/drivers/net/wireless/iwlwifi/iwl-nvm-parse.c @@ -192,6 +192,10 @@ static int iwl_init_channel_map(struct device *dev, const struct iwl_cfg *cfg, continue; } + if (ch_idx >= NUM_2GHZ_CHANNELS && + !data->sku_cap_band_52GHz_enable) + continue; + channel = &data->channels[n_channels]; n_channels++; -- 1.8.1.msysgit.1 --------------080204090707000405030806--