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authorFlorian Fainelli <f.fainelli@gmail.com>2017-11-02 16:08:40 -0700
committerDavid S. Miller <davem@davemloft.net>2017-11-03 14:30:02 +0900
commit93824c80bf47ebe087414b3a40ca0ff9aab7d1fb (patch)
treea77e4f4b86b415b2369acdf070bdabc7c231aa3a /drivers
parent3b11775033dc87c3d161996c54507b15ba26414a (diff)
downloadlinux-93824c80bf47ebe087414b3a40ca0ff9aab7d1fb.tar.bz2
net: systemport: Correct IPG length settings
Due to a documentation mistake, the IPG length was set to 0x12 while it should have been 12 (decimal). This would affect short packet (64B typically) performance since the IPG was bigger than necessary. Fixes: 44a4524c54af ("net: systemport: Add support for SYSTEMPORT Lite") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/broadcom/bcmsysport.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index 83eec9a8c275..eb441e5e2cd8 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -1809,15 +1809,17 @@ static inline void bcm_sysport_mask_all_intrs(struct bcm_sysport_priv *priv)
static inline void gib_set_pad_extension(struct bcm_sysport_priv *priv)
{
- u32 __maybe_unused reg;
+ u32 reg;
- /* Include Broadcom tag in pad extension */
+ reg = gib_readl(priv, GIB_CONTROL);
+ /* Include Broadcom tag in pad extension and fix up IPG_LENGTH */
if (netdev_uses_dsa(priv->netdev)) {
- reg = gib_readl(priv, GIB_CONTROL);
reg &= ~(GIB_PAD_EXTENSION_MASK << GIB_PAD_EXTENSION_SHIFT);
reg |= ENET_BRCM_TAG_LEN << GIB_PAD_EXTENSION_SHIFT;
- gib_writel(priv, reg, GIB_CONTROL);
}
+ reg &= ~(GIB_IPG_LEN_MASK << GIB_IPG_LEN_SHIFT);
+ reg |= 12 << GIB_IPG_LEN_SHIFT;
+ gib_writel(priv, reg, GIB_CONTROL);
}
static int bcm_sysport_open(struct net_device *dev)