spi/fsl-espi: Correct the maximum transaction length

The maximum length during one transcation is 64KiB.

Signed-off-by: Hou Zhiqiang <B48286@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-fsl-espi.c b/drivers/spi/spi-fsl-espi.c
index 7fd6a4c..7cb0c19 100644 (file)
--- a/drivers/spi/spi-fsl-espi.c
+++ b/drivers/spi/spi-fsl-espi.c
@@ -84,7 +84,7 @@ struct fsl_espi_transfer {
 /* SPCOM register values */
 #define SPCOM_CS(x)            ((x) << 30)
 #define SPCOM_TRANLEN(x)       ((x) << 0)
-#define        SPCOM_TRANLEN_MAX       0xFFFF  /* Max transaction length */
+#define        SPCOM_TRANLEN_MAX       0x10000 /* Max transaction length */
 
 #define AUTOSUSPEND_TIMEOUT 2000
 
@@ -233,7 +233,7 @@ static int fsl_espi_bufs(struct spi_device *spi, struct spi_transfer *t)
        reinit_completion(&mpc8xxx_spi->done);
 
        /* Set SPCOM[CS] and SPCOM[TRANLEN] field */
-       if ((t->len - 1) > SPCOM_TRANLEN_MAX) {
+       if (t->len > SPCOM_TRANLEN_MAX) {
                dev_err(mpc8xxx_spi->dev, "Transaction length (%d)"
                                " beyond the SPCOM[TRANLEN] field\n", t->len);
                return -EINVAL;