[SRU][Bionic/dell300x][PATCH 0/1] dell300x: rsi wifi and bluetooth crash after suspend and resume

Hui Wang hui.wang at canonical.com
Thu Aug 19 04:05:10 UTC 2021

BugLink: https://bugs.launchpad.net/bugs/1940488

I tested the upstream stable kernel 4.19.191, also could reproduce
this issue, and reported this testing result to stable mail list.

On the Dell300x machine, after system suspend and resume, the wifi
and bluetooth can't work anymore.

Revert a patch which was applied to bionic kernel from stable update.

Booting up with the patched kernel, run $sudo rtcwake -m freeze -s 10,
then check dmesg to make sure there is crashing log, and run 'nmcli d
wifi' and 'bluetoothctl, power on, scan on', all worked well.

[Where problems could occur]
After applying this SRU, the rsi wifi and bluetooth could have come
change, like wifi and bluetooth can't work well after resume, but this
possibility is very low, I already run '$sudo rtcwake -m freeze -s 10'
for 50 times, the wifi and bluetooth still worked well.

Hui Wang (1):
  Revert "rsi: Use resume_noirq for SDIO"

 drivers/net/wireless/rsi/rsi_91x_sdio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)


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