spi: spi-bfin5xx: Initialize cr_width in bfin_spi_pump_transfers()

cr_width may be not initialized before using by cr, the related warning
(with defconfig under blackfin by gcc5):

    CC      drivers/spi/spi-bfin5xx.o
  drivers/spi/spi-bfin5xx.c: In function 'bfin_spi_pump_transfers':
  drivers/spi/spi-bfin5xx.c:655:5: warning: 'cr_width' may be used uninitialized in this function [-Wmaybe-uninitialized]
    cr |= cr_width;
       ^

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-bfin5xx.c b/drivers/spi/spi-bfin5xx.c
index 37079937d2f77a5b33e20086b6d2a1c6d4fe5331..a3d65b4f49445d144fcba077ce3413630300e8c8 100644 (file)
--- a/drivers/spi/spi-bfin5xx.c
+++ b/drivers/spi/spi-bfin5xx.c
@@ -559,7 +559,7 @@ static void bfin_spi_pump_transfers(unsigned long data)
        struct spi_transfer *previous = NULL;
        struct bfin_spi_slave_data *chip = NULL;
        unsigned int bits_per_word;
-       u16 cr, cr_width, dma_width, dma_config;
+       u16 cr, cr_width = 0, dma_width, dma_config;
        u32 tranf_success = 1;
        u8 full_duplex = 0;
 
@@ -648,7 +648,6 @@ static void bfin_spi_pump_transfers(unsigned long data)
        } else if (bits_per_word == 8) {
                drv_data->n_bytes = bits_per_word/8;
                drv_data->len = transfer->len;
-               cr_width = 0;
                drv_data->ops = &bfin_bfin_spi_transfer_ops_u8;
        }
        cr = bfin_read(&drv_data->regs->ctl) & ~(BIT_CTL_TIMOD | BIT_CTL_WORDSIZE);