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Ryo Takakura
e1ca3ff28a
startup()/shutdown() callbacks access SIFIVE_SERIAL_IE_OFFS.
The register is also accessed from write() callback.
If console were printing and startup()/shutdown() callback
gets called, its access to the register could be overwritten.
Add port->lock to startup()/shutdown() callbacks to make sure
their access to SIFIVE_SERIAL_IE_OFFS is synchronized against
write() callback.
Fixes: 45c054d081 ("tty: serial: add driver for the SiFive UART")
Signed-off-by: Ryo Takakura <[email protected]>
Reviewed-by: Petr Mladek <[email protected]>
Cc: [email protected]
Reviewed-by: John Ogness <[email protected]>
Rule: add
Link: https://lore.kernel.org/stable/20250330003522.386632-1-ryotkkr98%40gmail.com
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>