lkml.org 
[lkml]   [2021]   [Jan]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] net: stmmac: Fixed mtu channged by cache aligned
Date
Since the original mtu is not used when the mtu is updated,
the mtu is aligned with cache, this will get an incorrect.
For example, if you want to configure the mtu to be 1500,
but mtu 1536 is configured in fact.

Fixed: eaf4fac478077 ("net: stmmac: Do not accept invalid MTU values")
Signed-off-by: David Wu <david.wu@rock-chips.com>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 5b1c12ff98c0..e8640123db76 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4025,7 +4025,7 @@ static void stmmac_set_rx_mode(struct net_device *dev)
static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
{
struct stmmac_priv *priv = netdev_priv(dev);
- int txfifosz = priv->plat->tx_fifo_size;
+ int txfifosz = priv->plat->tx_fifo_size, mtu = new_mtu;

if (txfifosz == 0)
txfifosz = priv->dma_cap.tx_fifo_size;
@@ -4043,7 +4043,7 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
if ((txfifosz < new_mtu) || (new_mtu > BUF_SIZE_16KiB))
return -EINVAL;

- dev->mtu = new_mtu;
+ dev->mtu = mtu;

netdev_update_features(dev);

--
2.19.1


\
 
 \ /
  Last update: 2021-01-13 04:51    [W:0.071 / U:0.244 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site