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Bug#664767: Brcmsmac driver woes, possible regression?



On Wed, 2012-05-30 at 12:27 -0500, Jonathan Nieder wrote:
> found 664767 linux-2.6/3.2.12-1
> tags 664767 - moreinfo
> quit
> 
> Camaleón wrote:
> 
> > Anyway, after having loaded kernel 3.2.19 (with the set of patches
> > applied) for all the weekend and until today, I've experienced NO
> > reconnects nor random connection downs which means the wireless link
> > runs stable and at least it's usable here :-)
> 
> Nice.  Let's call that a success.
> 
> Kernel team: here is a list of the patches[*] Camaleón applied:
> 
>   6b1a89afbf97 brcm80211: smac: drop "40MHz intolerant" flag from HT
>                capability info
>   c261bdf8acad brcm80211: smac: indicate severe problems to Mac80211
>   0bf1f883fd0a brcm80211: smac: removed MPC related code
>   4412953061de brcm80211: smac: removed MPC related variables
>   28237002e726 brcm80211: smac: removed down-on-watchdog MPC functionality
>   43ac09722f8e brcm80211: smac: removed down-on-rf-kill functionality
>   a8bc4917ed6b brcm80211: smac: bugfix for tx mute in brcms_b_init()
>   c6c44893c864 brcm80211: smac: fixed inconsistency in transmit mute
>   2646c46d5679 brcm80211: smac: modified Mac80211 callback interface
>   dc460127898c brcm80211: smac: mute transmit on ops_start
>   1525662ac280 brcm80211: smac: changed check to confirm STA only support
>   b7eec4233c34 brcm80211: smac: replace own access category definitions
>                with mac80211 enum
>   e9ca530a7b18 brcm80211: smac: don't modify sta parameters when adding sta
>   8906c43cb160 brcm80211: smac: fix channel frequency
>   02a588a2e3b9 brcm80211: smac: combine promiscuous mode functionality
>   be667669ec01 brcm80211: smac: added support for mac80211 filter flags
>  [d3f311349add brcm80211: fix usage of set tx power] --- unrelated, my mistake
>   aa1f2f0a3218 brcm80211: smac: precendence bug in wlc_phy_attach()
>   1570e53c14ff brcm80211: smac: fix unintended fallthru in
>                wlc_phy_radio_init_2057()
>   137dabed34a1 brcm80211: smac: remove smatch warnings from brcmsmac code
>   2b0a53d51b5f brcm80211: smac: only print block-ack timeout message at
>                trace level
>   6b8da423315b brcm80211: smac: do not use US as fallback regulatory hint
>   94a2ca311cf4 brcm80211: smac: only provide valid regulatory hint
> 
> It's not clear to me which of these addresses the memory corruption
> and random reconnects Camaleón was experiencing.  I think we should
> take them all.  (It's basically a backport of brcmsmac changes to
> date, minus the switch to BCMA.)
[...]

I'm sorry but I don't agree.  This would seem to leave us with a version
of brcmsmac that's quite different from what anyone else uses.  Please
try to identify which of these are the really important changes and
propose them for stable.

(It may however be sensible to use the 'compat-wireless' tree as a means
to keep wireless drivers updated in wheezy.  I keep meaning to look into
the details of this and then discuss it with the kernel and release
teams.)

Ben.

-- 
Ben Hutchings
The obvious mathematical breakthrough [to break modern encryption] would be
development of an easy way to factor large prime numbers. - Bill Gates

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