[PATCH v4 0/2] Bluetooth: btmtksdio: teardown fixes

[Sergey Senozhatsky]

This fixes several teardown issues:

     INFO: task kworker/u17:0:189 blocked for more than 122 seconds.
     __cancel_work_timer+0x3f4/0x460
     cancel_work_sync+0x1c/0x2c
     btmtksdio_flush+0x2c/0x40
     hci_dev_open_sync+0x10c4/0x2190
     [..]

close/flush can deadlock when run concurrently with btmtksdio_txrx_work().
In addition btmtksdio_txrx_work() re-enables interrupts regardless of
close/flush being executed on another CPU.

v3 -> v4:
- fix commit message linter warnings/errors (tabs, subject line over 80
  chars).

Sergey Senozhatsky (2):
  Bluetooth: btmtksdio: test for BUS IO errors in btmtksdio_txrx_work()
  Bluetooth: btmtksdio: call cancel_work_sync() out of host lock scope

 drivers/bluetooth/btmtksdio.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

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2.54.0.1189.g8c84645362-goog