net: sxgbe: fix potential null dereference
This fixes following:
drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c:1828 sxgbe_hw_init()
error: potential null dereference 'priv->hw'. (kmalloc returns null)
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Byungho An <bh74.an@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
index ee1fd3c..a72688e 100644
--- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
+++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_main.c
@@ -2039,11 +2039,13 @@
* Description: this function checks the HW capability
* (if supported) and sets the driver's features.
*/
-static void sxgbe_hw_init(struct sxgbe_priv_data * const priv)
+static int sxgbe_hw_init(struct sxgbe_priv_data * const priv)
{
u32 ctrl_ids;
priv->hw = kmalloc(sizeof(*priv->hw), GFP_KERNEL);
+ if(!priv->hw)
+ return -ENOMEM;
/* get the hardware ops */
sxgbe_get_ops(priv->hw);
@@ -2064,6 +2066,8 @@
if (priv->hw_cap.rx_csum_offload)
pr_info("RX Checksum offload supported\n");
+
+ return 0;
}
/**
@@ -2102,7 +2106,9 @@
sxgbe_verify_args();
/* Init MAC and get the capabilities */
- sxgbe_hw_init(priv);
+ ret = sxgbe_hw_init(priv);
+ if (ret)
+ goto error_free_netdev;
/* allocate memory resources for Descriptor rings */
ret = txring_mem_alloc(priv);