• Geert Uytterhoeven's avatar
    serial: stm32: Fix comparisons with undefined register · b20fb13c
    Geert Uytterhoeven authored
        drivers/tty/serial/stm32-usart.c: In function ‘stm32_receive_chars’:
        drivers/tty/serial/stm32-usart.c:130: warning: comparison is always true due to limited range of data type
        drivers/tty/serial/stm32-usart.c: In function ‘stm32_tx_dma_complete’:
        drivers/tty/serial/stm32-usart.c:177: warning: comparison is always false due to limited range of data type
    
    stm32_usart_offsets.icr is u8, while UNDEF_REG = ~0 is int, and thus
    0xffffffff.
    
    As all registers in stm32_usart_offsets are u8, change the definition of
    UNDEF_REG to 0xff to fix this.
    
    Fixes: ada8618f ("serial: stm32: adding support for stm32f7")
    Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    b20fb13c
stm32-usart.h 6.24 KB