layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 701-net-0032-sdk_dpaa-ls1043a-errata-restrict-the-max-mtu.patch

diff --git a/target/linux/layerscape/patches-5.4/701-net-0032-sdk_dpaa-ls1043a-errata-restrict-the-max-mtu.patch b/target/linux/layerscape/patches-5.4/701-net-0032-sdk_dpaa-ls1043a-errata-restrict-the-max-mtu.patch
new file mode 100644 (file)
index 0000000..7b70452
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0032-sdk_dpaa-ls1043a-errata-restrict-the-max-mtu.patch
@@ -0,0 +1,33 @@
+From b204d76e9a64ec99f0151b7ca018f3b6df2bb1b7 Mon Sep 17 00:00:00 2001
+From: Camelia Groza <camelia.groza@nxp.com>
+Date: Tue, 19 Sep 2017 11:30:50 +0300
+Subject: [PATCH] sdk_dpaa: ls1043a errata: restrict the max mtu
+
+We can not allow for Jumbo frames and large MTU values on LS1043A due to
+the A-010022 FMan errata. All outgoing frames larger than 4K bytes are dropped.
+
+Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
+---
+ drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_common.c | 11 ++++++++++-
+ 1 file changed, 10 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_common.c
++++ b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_common.c
+@@ -263,7 +263,16 @@ EXPORT_SYMBOL(dpa_get_stats64);
+ 
+ int dpa_change_mtu(struct net_device *net_dev, int new_mtu)
+ {
+-      const int max_mtu = dpa_get_max_mtu();
++      int max_mtu = dpa_get_max_mtu();
++
++#ifndef CONFIG_PPC
++      /* Due to the A010022 FMan errata, we can not use contig frames larger
++       * than 4K, nor S/G frames. We need to prevent the user from setting a
++       * large MTU.
++       */
++      if (unlikely(dpaa_errata_a010022))
++              max_mtu = DPA_BP_RAW_SIZE;
++#endif
+ 
+       /* Make sure we don't exceed the Ethernet controller's MAXFRM */
+       if (new_mtu < 68 || new_mtu > max_mtu) {