[0/2] mwifiex: Work around firmware bugs on 88W8897 chip

Message

Jonas Dreßler Aug. 30, 2021, 12:37 p.m. UTC

Two patches which should fix all the random resets of the Marvell 88W8897 PCIe chip.
The first one works around a bug in the firmware that causes it to crash, the second
one makes us try harder to wake up the firmware before we consider it non-responsive.
More explanations in the commit messages.

Jonas Dreßler (2):
  mwifiex: Use non-posted PCI register writes
  mwifiex: Try waking the firmware until we get an interrupt

 drivers/net/wireless/marvell/mwifiex/pcie.c | 35 +++++++++++++++++----
 1 file changed, 29 insertions(+), 6 deletions(-)

Comments

Pali Rohár Sept. 25, 2021, 5:32 p.m. UTC | #1

FYI: There is a new NXP driver for these ex-Marvell wifi chips:
https://source.codeaurora.org/external/nxpwifi/mwifiex/tree/mxm_wifiex/wlan_src/mlinux?h=caf/master

And NXP has there also some modified mwifiex driver:
https://source.codeaurora.org/external/nxpwifi/mwifiex/tree/mwifiex_8997/mlinux?h=caf/master&id=070397228c46e0a6afce4f627b032d3818cc1356

Maybe somebody could be interested in looking into those NXP driver
modifications... Maybe NXP fixed some issues here.

Also look at another new bug report related to mwifiex firmware:
https://lore.kernel.org/linux-wireless/[e-mail]/