Re: [Regression]BCM4312 is broken in kernel 4.18[Root cause found]

[prabhu <d.praabhu@gmail.com>]

Larry,

I am using archlinux and in their wiki they specifically mentioned to
not update firmware for BCM4312.
https://wiki.archlinux.org/index.php/broadcom_wireless

>From the build script I can see that I am using version
"broadcom-wl-5.100.138.tar.bz2."
And I guess, you ask me to update to version
"broadcom-wl-6.30.163.46.tar.bz2", which they suggest not to do.

This is the reason I stick with older FW version.

So my question is,
do you still want me to update the firmware or try with the attached patch?
On Fri, Aug 24, 2018 at 12:50 AM Larry Finger <Larry.Finger@lwfinger.net> wrote:
>
> On 08/23/2018 12:30 PM, prabhu wrote:
> > Hi,
> >
> > BCM 4312 wifi card stopped working from kernel version 4.18
> > After boot up it tries to reconnect for few times and after that it
> > disconnected completely.
> >
> > Here is the snippet from dmesg:
> > [ 70.826051] [drm:radeon_cs_parser_relocs [radeon]] *ERROR* gem object
> > lookup failed 0xd
> > [ 70.826090] [drm:radeon_cs_ioctl [radeon]] *ERROR* Failed to parse
> > relocation -2!
> > [ 238.066341] b43-phy0: Controller RESET (Out of order TX) ...
> > [ 238.306116] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
> > [ 245.443095] b43-phy0: Controller restarted
> > [ 285.552662] wlan0: deauthenticated from 98:de:d0:4b:e6:f6 (Reason:
> > 6=CLASS2_FRAME_FROM_NONAUTH_STA)
> > [ 285.639719] wlan0: authenticate with 98:de:d0:4b:e6:f6
> > [ 285.656291] wlan0: send auth to 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 285.658957] wlan0: authenticated
> > [ 285.662386] wlan0: associate with 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 285.665581] wlan0: RX AssocResp from 98:de:d0:4b:e6:f6 (capab=0x431
> > status=0 aid=2)
> > [ 285.666396] wlan0: associated
> > [ 309.348063] b43-phy0: Controller RESET (Out of order TX) ...
> > [ 309.592485] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
> > [ 316.742829] b43-phy0: Controller restarted
> > [ 329.268570] perf: interrupt took too long (2513 > 2500), lowering
> > kernel.perf_event_max_sample_rate to 79500
> > [ 400.542426] wlan0: deauthenticated from 98:de:d0:4b:e6:f6 (Reason:
> > 6=CLASS2_FRAME_FROM_NONAUTH_STA)
> > [ 400.636523] wlan0: authenticate with 98:de:d0:4b:e6:f6
> > [ 400.652666] wlan0: send auth to 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 400.655070] wlan0: authenticated
> > [ 400.655447] wlan0: associate with 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 400.658583] wlan0: RX AssocResp from 98:de:d0:4b:e6:f6 (capab=0x431
> > status=0 aid=2)
> > [ 400.659276] wlan0: associated
> > [ 412.256359] perf: interrupt took too long (3246 > 3141), lowering
> > kernel.perf_event_max_sample_rate to 61500
> > [ 555.832079] b43-phy0: Controller RESET (Out of order TX) ...
> > [ 556.082050] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
> > [ 563.172269] b43-phy0: Controller restarted
> > [ 619.628212] perf: interrupt took too long (4066 > 4057), lowering
> > kernel.perf_event_max_sample_rate to 48900
> > [ 766.268349] wlan0: deauthenticated from 98:de:d0:4b:e6:f6 (Reason:
> > 6=CLASS2_FRAME_FROM_NONAUTH_STA)
> > [ 766.317708] wlan0: authenticate with 98:de:d0:4b:e6:f6
> > [ 766.338515] wlan0: send auth to 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 766.345731] wlan0: authenticated
> > [ 766.347959] wlan0: associate with 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 766.352674] wlan0: RX AssocResp from 98:de:d0:4b:e6:f6 (capab=0x431
> > status=0 aid=2)
> > [ 766.353351] wlan0: associated
> > [ 801.234010] perf: interrupt took too long (5097 > 5082), lowering
> > kernel.perf_event_max_sample_rate to 39000
> > [ 1780.122837] perf: interrupt took too long (6979 > 6371), lowering
> > kernel.perf_event_max_sample_rate to 28500
> > [ 2347.465072] b43-phy0: Controller RESET (Out of order TX) ...
> > [ 2347.705572] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
> > [ 2354.735641] b43-phy0: Controller restarted
> > [ 2388.784785] wlan0: deauthenticated from 98:de:d0:4b:e6:f6 (Reason:
> > 6=CLASS2_FRAME_FROM_NONAUTH_STA)
> > [ 2388.901388] wlan0: authenticate with 98:de:d0:4b:e6:f6
> > [ 2388.918575] wlan0: send auth to 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 2388.920893] wlan0: authenticated
> > [ 2388.921243] wlan0: associate with 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 2388.924310] wlan0: RX AssocResp from 98:de:d0:4b:e6:f6 (capab=0x431
> > status=0 aid=2)
> > [ 2388.925336] wlan0: associated
> > [ 2973.297286] b43-phy0: Controller RESET (Out of order TX) ...
> > [ 2973.532792] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
> > [ 2980.496495] b43-phy0: Controller restarted
> > [ 5306.648339] wlan0: deauthenticating from 98:de:d0:4b:e6:f6 by local
> > choice (Reason: 3=DEAUTH_LEAVING)
> > [ 5306.909377] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
> > [ 5313.899248] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
> > [ 5320.225907] b43-phy0: Loading firmware version 666.2 (2011-02-23 01:15:07)
> > [ 5327.189103] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
> > [ 5328.567334] wlan0: authenticate with 98:de:d0:4b:e6:f6
> > [ 5328.599382] wlan0: send auth to 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 5328.601751] wlan0: authenticated
> > [ 5328.602238] wlan0: associate with 98:de:d0:4b:e6:f6 (try 1/3)
> > [ 5328.605468] wlan0: RX AssocResp from 98:de:d0:4b:e6:f6 (capab=0x431
> > status=0 aid=2)
> > [ 5328.606369] wlan0: associated
> > [ 5328.615757] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
> > [ 5348.732714] b43-phy0: Controller RESET (Out of order TX) ...
> >
> > The following commits introduce this regression in 4.18
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=66cffd6daab76caebab26eb803b92182414fc182
> >
> > I verified that in two ways:
> > 1. Downgrade the kernel to 4.17.14 - Fixes the Issue
> > 2. Revert that commit in 4.18.4 - Fixes the Issue
>
> Prabhu,
>
> Thanks for your diagnosis of the problem.
>
> Unfortunately, I was not able to reproduce your problem with my BCM4312 using
> kernel 4.18. The only difference  I could see is that I am using firmware
> version 784.2 rather than 666.2, which you are using. I do not think there was
> any difference for LP cores, thus I doubt that the differing versions makes any
> difference, but I would like you to see if you can update the firmware. If your
> distro does not support newer firmware, let me know and I can send you a couple
> of files needed to do an update.
>
> If updating the firmware does not help, then please try the attached patch for
> mainline 4.18. It uses the controller reset from the offending patch, but limits
> the resets to once every 40 out-of-order reports.
>
> Larry
>