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Looks like it's been this way since the driver's inception in 2007. Fixes the following W=1 kernel build warning(s): drivers/usb/host/r8a66597-hcd.c: In function ‘clear_all_buffer’: drivers/usb/host/r8a66597-hcd.c:478:6: warning: variable ‘tmp’ set but not used [-Wunused-but-set-variable] 478 | u16 tmp; | ^~~ Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20200706133341.476881-14-lee.jones@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>