From: Heinrich Schuchardt <xypron.glpk@gmx.de>
Date: Wed, 31 Jan 2018 00:05:54 +0000 (+0100)
Subject: atcspi200: avoid possible NULL dereference
X-Git-Url: http://git.ipfire.org/?p=people%2Fms%2Fu-boot.git;a=commitdiff_plain;h=923837e159c5886be38c7a83a2d6bc489b35c1f4

atcspi200: avoid possible NULL dereference

Check if ns before and not after dereferencing it.

Indicated by cppcheck.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---

diff --git a/drivers/spi/atcspi200_spi.c b/drivers/spi/atcspi200_spi.c
index 3e29df03a4..5b2e9d6264 100644
--- a/drivers/spi/atcspi200_spi.c
+++ b/drivers/spi/atcspi200_spi.c
@@ -297,6 +297,8 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 		return NULL;
 
 	ns = spi_alloc_slave(struct nds_spi_slave, bus, cs);
+	if (!ns)
+		return NULL;
 
 	switch (bus) {
 	case SPI0_BUS:
@@ -316,8 +318,6 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 	ns->to = SPI_TIMEOUT;
 	ns->max_transfer_length = MAX_TRANSFER_LEN;
 	ns->slave.max_write_size = MAX_TRANSFER_LEN;
-	if (!ns)
-		return NULL;
 
 	return &ns->slave;
 }