This is a note to let you know that I've just added the patch titled
net: systemport: Correct IPG length settings
to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: net-systemport-correct-ipg-length-settings.patch and it can be found in the queue-4.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Tue Nov 21 13:07:20 CET 2017
From: Florian Fainelli f.fainelli@gmail.com Date: Thu, 2 Nov 2017 16:08:40 -0700 Subject: net: systemport: Correct IPG length settings
From: Florian Fainelli f.fainelli@gmail.com
[ Upstream commit 93824c80bf47ebe087414b3a40ca0ff9aab7d1fb ]
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/broadcom/bcmsysport.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
--- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -1743,15 +1743,17 @@ static inline void bcm_sysport_mask_all_
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)
Patches currently in stable-queue which might be from f.fainelli@gmail.com are
queue-4.13/net-systemport-correct-ipg-length-settings.patch