From 563f6e0cb4a4a28e211216a8854d64e518e666ff Mon Sep 17 00:00:00 2001
From: Florian Pose <fp@igh.de>
Date: Fri, 3 Apr 2020 12:17:32 +0200
Subject: [PATCH] Replaced dma_zalloc_coherent.

---
 devices/ccat/netdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/devices/ccat/netdev.c b/devices/ccat/netdev.c
index f68193e5..b006d8f5 100644
--- a/devices/ccat/netdev.c
+++ b/devices/ccat/netdev.c
@@ -539,7 +539,12 @@ static int ccat_eth_priv_init_dma(struct ccat_eth_priv *priv)
 	dma->dev = &pdev->dev;
 	dma->size = CCAT_ALIGNMENT * 3;
 	dma->base =
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 0, 0)
+        /* since kernel 5 memory is zero'd implicitly */
+	    dma_alloc_coherent(dma->dev, dma->size, &dma->phys, GFP_KERNEL);
+#else
 	    dma_zalloc_coherent(dma->dev, dma->size, &dma->phys, GFP_KERNEL);
+#endif
 	if (!dma->base || !dma->phys) {
 		pr_err("init DMA memory failed.\n");
 		return -ENOMEM;