diff options
| author | Camelia Groza <camelia.groza@nxp.com> | 2017-09-19 08:30:50 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-09-25 07:25:53 (GMT) |
| commit | 2b537b7d4f5e6e938730dccf557cfbe979eaaae8 (patch) | |
| tree | 411bf4be8e9fb546959a16a6619b22f5c0a84e3c | |
| parent | aa0365c5b6706aa349e4a654f19b72aea8fcbdbd (diff) | |
| download | linux-2b537b7d4f5e6e938730dccf557cfbe979eaaae8.tar.xz | |
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>
| -rw-r--r-- | drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_common.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_common.c b/drivers/net/ethernet/freescale/sdk_dpaa/dpaa_eth_common.c index fbe61da..19a8a3c 100644 --- 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) { |