bnx2x: allocate memory dynamically in ethtool self-test.

From: Merav Sicron <meravs@broadcom.com>

Current ethtool self tests usesa large buffer on stack. This patch replaces
that array by dynamically allocated memory
Signed-off-by: Merav Sicron <meravs@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c

@@ -2016,14 +2016,22 @@ static int bnx2x_test_nvram(struct bnx2x *bp)
 		{ 0x708,  0x70 }, /* manuf_key_info */
 		{     0,     0 }
 	};
-	__be32 buf[0x350 / 4];
-	u8 *data = (u8 *)buf;
+	__be32 *buf;
+	u8 *data;
 	int i, rc;
 	u32 magic, crc;
 
 	if (BP_NOMCP(bp))
 		return 0;
 
+	buf = kmalloc(0x350, GFP_KERNEL);
+	if (!buf) {
+		DP(NETIF_MSG_PROBE, "kmalloc failed\n");
+		rc = -ENOMEM;
+		goto test_nvram_exit;
+	}
+	data = (u8 *)buf;
+
 	rc = bnx2x_nvram_read(bp, 0, data, 4);
 	if (rc) {
 		DP(NETIF_MSG_PROBE, "magic value read (rc %d)\n", rc);
@@ -2057,6 +2065,7 @@ static int bnx2x_test_nvram(struct bnx2x *bp)
 	}
 
 test_nvram_exit:
+	kfree(buf);
 	return rc;
 }