linux-kernel - [PATCH v3 0/9] serial: qcom-geni: fix receiver enable

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Message-ID: <20241009145110.16847-1-johan+linaro@kernel.org>
Date: Wed,  9 Oct 2024 16:51:01 +0200
From: Johan Hovold <johan+linaro@...nel.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jirislaby@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konradybcio@...nel.org>,
	Douglas Anderson <dianders@...omium.org>,
	Mukesh Kumar Savaliya <quic_msavaliy@...cinc.com>,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-serial@...r.kernel.org,
	Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH v3 0/9] serial: qcom-geni: fix receiver enable

This series is a follow up to the console fixes in 6.12-rc1 that can
interact badly with some pre-existing bugs.

Specifically, the receiver could end up being disabled when
set_termios() races with the console code during boot. This can manifest
itself as a serial getty not accepting input.

Fixing the missing locking in set_termios() exposes another
long-standing bug in the DMA implementation (e.g. used for Bluetooth),
which is also fixed.

Johan


Changes in v3
 - fix polled console initialisation
 - revert broken hibernation support
 - rename suspend PM ops

Changes in v2
 - keep the call to stop rx in shutdown() which is called also on
   hangups
 - fix rx dma cancellation
 - fix rx cancel dma status bit
 - drop flip buffer WARN()
 - drop unused receive parameter

Johan Hovold (9):
  serial: qcom-geni: fix polled console initialisation
  serial: qcom-geni: revert broken hibernation support
  serial: qcom-geni: fix shutdown race
  serial: qcom-geni: fix dma rx cancellation
  serial: qcom-geni: fix receiver enable
  serial: qcom-geni: fix rx cancel dma status bit
  serial: qcom-geni: drop flip buffer WARN()
  serial: qcom-geni: drop unused receive parameter
  serial: qcom-geni: rename suspend functions

 drivers/tty/serial/qcom_geni_serial.c | 103 ++++++++++++--------------
 include/linux/soc/qcom/geni-se.h      |   2 +-
 2 files changed, 49 insertions(+), 56 deletions(-)

-- 
2.45.2