stmmac: handle allocation errors in setup functions
If the allocations fail in either dwmac1000_setup() or dwmac100_setup()
then return NULL. These are called from stmmac_mac_device_setup(). The
check for NULL returns in stmmac_mac_device_setup() needed to be moved
forward a couple lines.
Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/stmmac/dwmac1000_core.c b/drivers/net/stmmac/dwmac1000_core.c
index 917b4e1..2b2f5c8 100644
--- a/drivers/net/stmmac/dwmac1000_core.c
+++ b/drivers/net/stmmac/dwmac1000_core.c
@@ -220,6 +220,8 @@
((uid & 0x0000ff00) >> 8), (uid & 0x000000ff));
mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
+ if (!mac)
+ return NULL;
mac->mac = &dwmac1000_ops;
mac->dma = &dwmac1000_dma_ops;
diff --git a/drivers/net/stmmac/dwmac100_core.c b/drivers/net/stmmac/dwmac100_core.c
index 6f270a0..2fb165f 100644
--- a/drivers/net/stmmac/dwmac100_core.c
+++ b/drivers/net/stmmac/dwmac100_core.c
@@ -179,6 +179,8 @@
struct mac_device_info *mac;
mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL);
+ if (!mac)
+ return NULL;
pr_info("\tDWMAC100\n");
diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
index acf0616..0bdd332 100644
--- a/drivers/net/stmmac/stmmac_main.c
+++ b/drivers/net/stmmac/stmmac_main.c
@@ -1558,15 +1558,15 @@
else
device = dwmac100_setup(ioaddr);
+ if (!device)
+ return -ENOMEM;
+
if (priv->enh_desc) {
device->desc = &enh_desc_ops;
pr_info("\tEnhanced descriptor structure\n");
} else
device->desc = &ndesc_ops;
- if (!device)
- return -ENOMEM;
-
priv->hw = device;
priv->wolenabled = priv->hw->pmt; /* PMT supported */