Quoting Douglas Anderson (2018-10-29 11:07:01) > The geni serial driver already had some sysrq code in it, but since > SUPPORT_SYSRQ wasn't defined the code didn't do anything useful. > Let's make it useful by adding that define using the same formula > found in other serial drivers. > > In order to prevent deadlock, we'll take a page from the > 'msm_serial.c' where the spinlock is released around > uart_handle_sysrq_char(). This seemed better than copying from > '8250_port.c' where we skip locking in the console_write function > since the '8250_port.c' method can cause lockdep warnings when > dropping into kgdb. > > Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx> Given that it's the same as msm_serial.c, and I wrote the msm_serial.c "hack" then: Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
