[PATCH v3 0/2] serial: sifive: Convert sifive console to nbcon

[Ryo Takakura]

Hi!

This series convert sifive console to nbcon.

The first patch fixes the issue which was pointed out by John [0] 
that the driver has been accessing SIFIVE_SERIAL_IE_OFFS register 
on its ->startup() and ->shutdown() without port lock synchronization 
against ->write().

The fix on the first patch still applies to the second patch which 
converts the console to nbcon as ->write_thread() holds port lock
and ->write_atomic() checks for the console ownership.

Sincerely,
Ryo Takakura

[0] https://lore.kernel.org/lkml/84sen2fo4b.fsf@jogness.linutronix.de/

---

Changes since v1:
[1] https://lore.kernel.org/lkml/20250323060603.388621-1-ryotkkr98@gmail.com/

- Thank you John for the feedback!
- Add a patch for synchronizing startup()/shutdown() vs write(). 
- Add <Reviewed-by> by John.

Changes since v2:
[2] https://lore.kernel.org/all/20250330003058.386447-1-ryotkkr98@gmail.com/ 

- Add Cc stable for the first patch.

---

Ryo Takakura (2):
  serial: sifive: lock port in startup()/shutdown() callbacks
  serial: sifive: Switch to nbcon console

 drivers/tty/serial/sifive.c | 93 +++++++++++++++++++++++++++++++------
 1 file changed, 80 insertions(+), 13 deletions(-)

-- 
2.34.1