layerscape: add patches-5.4

[openwrt/staging/wigyori.git] / target / linux / layerscape / patches-5.4 / 701-net-0182-staging-dpaa2-evb-Update-MTU-update-procedure.patch

diff --git a/target/linux/layerscape/patches-5.4/701-net-0182-staging-dpaa2-evb-Update-MTU-update-procedure.patch b/target/linux/layerscape/patches-5.4/701-net-0182-staging-dpaa2-evb-Update-MTU-update-procedure.patch
new file mode 100644 (file)
index 0000000..a3c87ea
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0182-staging-dpaa2-evb-Update-MTU-update-procedure.patch
@@ -0,0 +1,57 @@
+From e9c0434a55a0ddf28b1e7868890eb7557b2c28f9 Mon Sep 17 00:00:00 2001
+From: Razvan Stefanescu <razvan.stefanescu@nxp.com>
+Date: Thu, 17 Aug 2017 19:47:22 +0300
+Subject: [PATCH] staging: dpaa2-evb: Update MTU update procedure
+
+Set limits on the MTU to accommodate netdevice update. There is no need to
+check the limits before setting the new value.
+
+Signed-off-by: Razvan Stefanescu <razvan.stefanescu@nxp.com>
+---
+ drivers/staging/fsl-dpaa2/evb/evb.c | 18 ++++++++----------
+ 1 file changed, 8 insertions(+), 10 deletions(-)
+
+--- a/drivers/staging/fsl-dpaa2/evb/evb.c
++++ b/drivers/staging/fsl-dpaa2/evb/evb.c
+@@ -53,9 +53,9 @@ static const char evb_drv_version[] = "0
+ #define DPDMUX_MAX_IRQ_NUM                    2
+ 
+ /* MAX FRAME LENGTH (currently 10k) */
+-#define EVB_MAX_FRAME_LENGTH                  (10 * 1024)
+-/* MIN FRAME LENGTH (64 bytes + 4 bytes CRC) */
+-#define EVB_MIN_FRAME_LENGTH                  68
++#define EVB_MAX_FRAME_LENGTH          (10 * 1024)
++#define EVB_MAX_MTU                   (EVB_MAX_FRAME_LENGTH - VLAN_ETH_HLEN)
++#define EVB_MIN_MTU                   68
+ 
+ struct evb_port_priv {
+       struct net_device       *netdev;
+@@ -457,16 +457,10 @@ static int evb_change_mtu(struct net_dev
+       if (port_priv->port_index > 0)
+               return -EPERM;
+ 
+-      if (mtu < EVB_MIN_FRAME_LENGTH || mtu > EVB_MAX_FRAME_LENGTH) {
+-              netdev_err(netdev, "Invalid MTU %d. Valid range is: %d..%d\n",
+-                         mtu, EVB_MIN_FRAME_LENGTH, EVB_MAX_FRAME_LENGTH);
+-              return -EINVAL;
+-      }
+-
+       err = dpdmux_set_max_frame_length(evb_priv->mc_io,
+                                         0,
+                                         evb_priv->mux_handle,
+-                                        (uint16_t)mtu);
++                                        (uint16_t)(mtu + VLAN_ETH_HLEN));
+ 
+       if (unlikely(err)) {
+               netdev_err(netdev, "dpdmux_ul_set_max_frame_length err %d\n",
+@@ -1291,6 +1285,10 @@ static int evb_probe(struct fsl_mc_devic
+ 
+                       list_add(&port_priv->list, &priv->port_list);
+               } else {
++                      /* Set MTU limits only on uplink */
++                      port_netdev->min_mtu = EVB_MIN_MTU;
++                      port_netdev->max_mtu = EVB_MAX_MTU;
++
+                       err = register_netdev(netdev);
+ 
+                       if (err < 0) {