[U-Boot] [PATCH 1/1] arm: sunxi: Add NULL pointer check

Current driver doesn't check if the destination pointer is NULL. This cause the data from the FIFO to be stored inside the internal SDRAM ( address 0 ).

The patch add simple check if the destination pointer is NULL.

Signed-off-by: Stefan Mavrodiev stefan@olimex.com --- drivers/spi/sun4i_spi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/sun4i_spi.c b/drivers/spi/sun4i_spi.c index b86b5a00ad..38cc743c61 100644 --- a/drivers/spi/sun4i_spi.c +++ b/drivers/spi/sun4i_spi.c @@ -129,7 +129,8 @@ static inline void sun4i_spi_drain_fifo(struct sun4i_spi_priv *priv, int len)

while (len--) { byte = readb(&priv->regs->rxdata); - *priv->rx_buf++ = byte; + if (priv->rx_buf) + *priv->rx_buf++ = byte; } }