[U-Boot] [PATCH 1/1] spi: atcspi200: avoid NULL dereference

[Heinrich Schuchardt]

For SPI_XFER_BEGIN | SPI_XFER_END the code sets data_out = NULL.
In the debug statement we should not dereference this value.
As we do not transfer any data the debug statement is not needed in this
case anyway.

Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
---
 drivers/spi/atcspi200_spi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/atcspi200_spi.c b/drivers/spi/atcspi200_spi.c
index bc08914b9e..2638f2ab25 100644
--- a/drivers/spi/atcspi200_spi.c
+++ b/drivers/spi/atcspi200_spi.c
@@ -230,8 +230,10 @@ static int __atcspi200_spi_xfer(struct nds_spi_slave *ns,
 			__atcspi200_spi_start(ns);
 			break;
 		}
-		debug("spi_xfer: data_out %08X(%p) data_in %08X(%p) data_len %u\n",
-		      *(uint *)data_out, data_out, *(uint *)data_in, data_in, data_len);
+		if (data_out)
+			debug("spi_xfer: data_out %08X(%p) data_in %08X(%p) data_len %u\n",
+			      *(uint *)data_out, data_out, *(uint *)data_in,
+			      data_in, data_len);
 		num_chunks = DIV_ROUND_UP(data_len, max_tran_len);
 		din = data_in;
 		dout = data_out;
-- 
2.16.2