On Fri, 2016-04-15 at 02:07 +0000, Borislav Petkov wrote: > Hi, > > so I'm seeing this when wlan0 tries to associate. On 4.6-rc2 + tip. > After that, wifi is dead in the water. Anyone have a clue? > > And 4.5 seems fine, I'm typing from it as we speak. > ... <snip> > [ 661.142657] ------------[ cut here ]------------ > [ 661.142816] WARNING: CPU: 1 PID: 2485 at > drivers/net/wireless/intel/iwlwifi/pcie/trans.c:1752 > iwl_trans_pcie_grab_nic_access+0x110/0x120 [iwlwifi] > [ 661.143231] Timeout waiting for hardware access (CSR_GP_CNTRL > 0xffffffff) > This means that we have an electrical issue that prevents us from accessing the device over the PCI bus. BAR has been garbaged or alike. Every time I tried to debug that from the driver side it has ... failed. Because the "good" in the end did exhibit the problem. So, unless you are ready to embark for a bisection journey (and hope that this time when you type 'git bisect good' it is really 'good'), I can't do much. What I can suggest is to install our latest backport based tree on 4.5. This will allow you to have an easily bisectable tree. But it might very well be that 4.5 + latest driver (equivalent to 4.6 as far as iwlwifi is concerned) will be fine. The backport tree is here [1]. Unfortunately, that's the only thing I can suggest for now. [1] https://git.kernel.org/cgit/linux/kernel/git/iwlwifi/backport-iwlwi fi.git/ > -- > Regards/Gruss, > Boris. > > ECO tip #101: Trim your mails when you reply. Srsly.��.n��������+%������w��{.n�����{���zW����ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
