Re: [PATCH net v4] net: wwan: qcom_bam_dmux: fix TX DMA channel use-after-free

Hi Stephan,

Thanks for the detailed review. I addressed the comments in v4:

- Replace pc_vote, pc_vote_acked, and pc_down_pending with the four-state
  bam_dmux_pc_vote enum.
- Remove the redundant dmux->rx check in bam_dmux_handle_pc().
- Use guard(mutex)() in runtime PM paths and devm_mutex_init() in probe.
- Let runtime_suspend() handle cleanup when runtime_resume() cannot acquire
  the TX channel, instead of calling bam_dmux_power_off() there.
- Request both state IRQs with IRQF_NO_AUTOEN, enable them only after the
  initial probe state is committed, and disable both before final remove
  cleanup.

The v4 patch is attached.

Regards,
Hongyan