Re: mwifiex 1.0 (16.68.10.p159) - PCIEUSB-8997 firmware is buggy

Héllo all,

A quick reply, just to correct a mistype sentence about the issue !

Le 27/09/2021 à 15:47, Josh Boyer a écrit :

On Sun, Sep 26, 2021 at 6:43 AM Pali Rohár [off-list ref] wrote:

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Hello Josh, Sharvari and other from NXP!

On Saturday 25 September 2021 19:23:48 Gérald Kerma wrote:

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Correcting old marvell address to new nxp...

Le 25/09/2021 à 19:19, Gérald Kerma a écrit :

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Héllo All,

I made some few tests on EspressoBin-Ultra from GlobalScaleTechnologies,
because of problem with the WiFi.

I have done some quick tests on all the firmware of PCIEUSB-8997 using
the pcieuart8997_combo_v4.bin on OpenWrt 21.02.x

Here is a summary of the tests :
- W16.68.10.p159 = KO
- W16.68.1.p195 = KO
- V16.68.1.p145 = OK
- 16.68.1.p140 = OK
- 16.68.1.p133 = OK
- 16.68.1.p97 = OK
- 16.68.1.p70 = KO

From this user test result can be seen that last two versions of
pcieusb8997_combo_v4.bin firmware file for 8997 wifi+bt card with
official mainline linux kernel driver mwifiex were not properly tested
internally in NXP and are causing serious issues which make 8997 card
basically unusable.

Sharvari and other NXP developers: Do you have some internal testing of
this pcieusb8997_combo_v4.bin firmware for PCIe+USB variant of 8997
wifi chips? Or are you aware of this issue and do you have in NXP some
workaround for it (e.g. at driver level)? Could you please look at this
serious issue and try to debug firmware and release a new version, as
this is obvious fatal error in firmware itself?

Josh, how you in linux-firmware repository handle such, I must say,
"fatal issues"? Wait for vendor fixes or revert problematic commits? Or
something else?

We can revert if we need to, but I think it's not quite that simple.

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Because when users starts upgrading linux-firmware packages in their
downstream distributions then basically wifi cards on this 8997 chips
with official mwifiex driver stops working.

The first broken version was committed in Feb of 2019.  That's
approaching 3 years ago.  Given that this is binary firmware, I have
no idea what else may or may not be included in the updates in the
meantime.

josh

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REF (and all details of tests) :
https://github.com/NXP/mwifiex-firmware/issues/1


Broken firmware :

Version |W16.68.1.p195| of |pcieusb8997_combo_v4.bin| was included into
linux-firmware repository by this pull request:
https://lore.kernel.org/all/CA+5PVA5yQbjg3vaT7F8120B6ngLn7+sZC0OWt0KoUiQR9hS4FA@mail.gmail.com/ (local)
<https://lore.kernel.org/all/CA+5PVA5yQbjg3vaT7F8120B6ngLn7+sZC0OWt0KoUiQR9hS4FA@mail.gmail.com/ (local)>

And latest version |W16.68.10.p159| of |pcieusb8997_combo_v4.bin| by
this pull request:
https://lore.kernel.org/linux-firmware/CA+5PVA5on7+CRtEV7tThPxgucwt3W9i-tEXm4cgH-AmMB-Jrtg@mail.gmail.com/ (local)
<https://lore.kernel.org/linux-firmware/CA+5PVA5on7+CRtEV7tThPxgucwt3W9i-tEXm4cgH-AmMB-Jrtg@mail.gmail.com/ (local)>

Olders looks to works better.

In quick tests, they allow more than 1 clients at a time !

In quick tests, they do *NOT* allow more than only 1 client at a time !

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I am still testing the V16.68.1.p145 and report the results after some
longer use...

Hopes it will help...
Regards,
Gérald Kerma
gandalf(at)gk2(dot)net

Gérald