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From: Yegor Yefremov <yegorslists@googlemail.com>
Date: Wed, 9 Apr 2014 11:14:08 +0200
Message-ID: <CAGm1_ksFRCUNi1DPfmv=+8bBqiWxLSm6EeSYjhfVwR7oiAWBkw@mail.gmail.com> (sfid-20140409_111434_552309_BBC2A838)
Subject: Re: wl1271: tx stuck in firmware
To: Luca Coelho <luca@coelho.fi>
Cc: linux-wireless@vger.kernel.org, kaloz@openwrt.org
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On Tue, Apr 8, 2014 at 10:29 PM, Luca Coelho <luca@coelho.fi> wrote:
> On Tue, 2014-04-08 at 17:28 +0200, Yegor Yefremov wrote:
>> I'm using kernel 3.14.0-rc4-12738-g674748b-dirty on a am335x-evmsk as
>> also on a custom board. I get following issue on both systems, when
>> working with various calibrator functions:
>
> That's not a very nice kernel, right? How am I supposed to know what the
> 12738 patches you have on top of 3.14.0-rc4 are? Even worse because your
> tree is dirty. :(
>
>
>> # calibrator wlan0 plt power_mode on
>> [  252.935208] wlcore: power up
>> [  253.502531] wlcore: firmware booted in PLT mode PLT_ON (PLT 6.3.10.0.133)
>> # [  399.656192] wlcore: ERROR Tx stuck (in FW) for 5000 ms. Starting recovery
>
> This sounds really strange.  The TX watchdog should not be armed in PLT
> mode.
>
>> or following error, when I start NetworkManager and wait for 5 minutes or so:
>>
>> [  717.608550] wlcore: Scan completed due to error.
>> [  717.613422] ------------[ cut here ]------------
>> [  717.618405] WARNING: CPU: 0 PID: 940 at
>> drivers/net/wireless/ti/wlcore/main.c:789
>> wl12xx_queue_recovery_work+0x60/0x6c()
>> [  717.629832] Modules linked in:
>> [  717.633055] CPU: 0 PID: 940 Comm: kworker/u2:2 Tainted: G        W
>>   3.14.0-rc4-12737-gefb78a0-dirty #214
>> [  717.643264] Workqueue: phy0 wl1271_scan_complete_work
>> [  717.648649] [<c00151e0>] (unwind_backtrace) from [<c0011e38>]
>> (show_stack+0x10/0x14)
>> [  717.656762] [<c0011e38>] (show_stack) from [<c05a1944>]
>> (dump_stack+0x7c/0x94)
>> [  717.664372] [<c05a1944>] (dump_stack) from [<c00402bc>]
>> (warn_slowpath_common+0x6c/0x90)
>> [  717.672876] [<c00402bc>] (warn_slowpath_common) from [<c004037c>]
>> (warn_slowpath_null+0x1c/0x24)
>> [  717.682110] [<c004037c>] (warn_slowpath_null) from [<c035be0c>]
>> (wl12xx_queue_recovery_work+0x60/0x6c)
>> [  717.691889] [<c035be0c>] (wl12xx_queue_recovery_work) from
>> [<c036d804>] (wl1271_scan_complete_work+0xf8/0x108)
>> [  717.702391] [<c036d804>] (wl1271_scan_complete_work) from
>> [<c0058ff4>] (process_one_work+0x1ac/0x4c4)
>> [  717.712110] [<c0058ff4>] (process_one_work) from [<c0059e88>]
>> (worker_thread+0x114/0x3b4)
>> [  717.720707] [<c0059e88>] (worker_thread) from [<c005fa44>]
>> (kthread+0xcc/0xe8)
>> [  717.728306] [<c005fa44>] (kthread) from [<c000e388>]
>> (ret_from_fork+0x14/0x2c)
>> [  717.735856] ---[ end trace f4d374bb2ca37664 ]---
>> [  717.743587] wlcore: Hardware recovery in progress. FW ver: Rev 6.3.10.0.133
>> [  717.752600] wlcore: pc: 0x0, hint_sts: 0x00000020 count: 6
>> [  717.759609] wlcore: down
>> [  717.764108] ieee80211 phy0: Hardware restart was requested
>> [  718.250930] wlcore: firmware booted (Rev 6.3.10.0.133)
>>
>> Any idea, what could be wrong?
>
> First of all, try a clean kernel.

It is not simple to get a clean kernel. "Official" support for
am335x-evmsk WLAN was added first in the upcoming 3.15 kernel. I've
tried the merge window version (3.14.0-12041-g75ff24f-dirty) and get
following issue:

# calibrator wlan0 plt power_mode on
wlcore: power up
wlcore: ERROR timeout waiting for the hardware to complete initialization
wlcore: ERROR timeout waiting for the hardware to complete initialization
wlcore: ERROR timeout waiting for the hardware to complete initialization
wlcore: ERROR firmware boot in PLT mode failed despite 3 retries
command failed: Input/output error (-5)

If I use the "normal" firmware, i.e. ifconfig wlan0 up, it gets loaded
and I can search for the stations. But PLT doesn't want to boot. Do
you still have a board, where you could try the latest
kernel/firmware?

Yegor