Re: [PATCH 0/4] serial: qcom-geni: fix console shutdown hang

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On 07/03/2023 16:44, Johan Hovold wrote:
This series fixes some of the fallout after a recent series adding
support for DMA transfers to the Qualcomm geni serial driver.

Most importantly it fixes a hang during reboot when using a serial
console and the getty is stopped during reboot.

Doug just posted an equivalent fix here:

	https://lore.kernel.org/lkml/20230307073155.1.Iaab0159b8d268060a0e131ebb27125af4750ef99@changeid

but the commit message only mentions the regression with respect to
kgdb, which is not as widely used serial consoles generally, so I
figured I'd post my version for completeness.

Either version of that fix should address the immediate regression, but
fixing the underlying problems which have been there since the driver
was first merged is going to be a bit more involved.

The rest of the series fixes a few bugs in the new DMA support that I
found while investigating the console regression.

Johan


Johan Hovold (4):
   serial: qcom-geni: fix console shutdown hang
   serial: qcom-geni: fix DMA mapping leak on shutdown
   serial: qcom-geni: fix mapping of empty DMA buffer
   serial: qcom-geni: drop bogus uart_write_wakeup()



Tested this series on RB5

Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
Tested-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>



--srini
  drivers/tty/serial/qcom_geni_serial.c | 11 +++++++----
  1 file changed, 7 insertions(+), 4 deletions(-)




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