Regarding possible bug in drivers/spi/spi-sh.c

[Madhuparna Bhowmik <madhuparnabhowmik10@xxxxxxxxx>]

Hello,

In this driver, work is activated at the end of the Interrupt handler.
It is not clear if it is possible to have another interrupt while the
work is executing. Since both spi_sh_work() and spi_sh_irq() are
accessing ss->cr1, if it is possible to have a race between these two
then lock should be held in the interrupt handler as well as
spi_sh_send() which is called from spi_sh_work(). Please let me know
if this race is possible.

Thank you,
Madhuparna