staging: greybus: spilib: fix use-after-free after deregistration
commit 770b03c2 upstream. Remove erroneous spi_master_put() after controller deregistration which would access the already freed spi controller. Note that spi_unregister_master() drops our only controller reference. Fixes: ba3e6700 ("greybus: SPI: convert to a gpbridge driver") Signed-off-by: Johan Hovold <johan@kernel.org> Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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