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 <ste...@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;
}
}
--
2.17.1
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