diff mbox series

[5/9] net: ethernet: mtk_eth_soc: fix RX data corruption issue

Message ID 96c628df0991104d255e6d4696988686387bc2ef.1675407169.git.daniel@makrotopia.org
State New
Headers
Series net: ethernet: mtk_eth_soc: various enhancements |

Commit Message

Daniel Golle Feb. 3, 2023, 7:02 a.m. UTC 
  Also set bit 12 when setting up MAC MCR, as MediaTek SDK did the same
change stating:
"If without this patch, kernel might receive invalid packets that are
corrupted by GMAC."[1]

[1]: https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/d8a2975939a12686c4a95c40db21efdc3f821f63
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
 drivers/net/ethernet/mediatek/mtk_eth_soc.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

Comments

Andrew Lunn Feb. 3, 2023, 2:09 p.m. UTC | #1 
On Fri, Feb 03, 2023 at 07:02:28AM +0000, Daniel Golle wrote:
> Also set bit 12 when setting up MAC MCR, as MediaTek SDK did the same
> change stating:
> "If without this patch, kernel might receive invalid packets that are
> corrupted by GMAC."[1]

Do you have any idea what this bit means? It would be nice to have a
more meaningful description.

     Andrew
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 9050423821dc..f09cd6a132c9 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -615,7 +615,7 @@  static int mtk_mac_finish(struct phylink_config *config, unsigned int mode,
 	/* Setup gmac */
 	mcr_cur = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
 	mcr_new = mcr_cur;
-	mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_FORCE_MODE |
+	mcr_new |= MAC_MCR_IPG_CFG | MAC_MCR_BIT_12 | MAC_MCR_FORCE_MODE |
 		   MAC_MCR_BACKOFF_EN | MAC_MCR_BACKPR_EN | MAC_MCR_FORCE_LINK;
 
 	/* Only update control register when needed! */
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index d39717582a85..20d8ea20f164 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -402,6 +402,7 @@ 
 #define MAC_MCR_FORCE_MODE	BIT(15)
 #define MAC_MCR_TX_EN		BIT(14)
 #define MAC_MCR_RX_EN		BIT(13)
+#define MAC_MCR_BIT_12		BIT(12)
 #define MAC_MCR_BACKOFF_EN	BIT(9)
 #define MAC_MCR_BACKPR_EN	BIT(8)
 #define MAC_MCR_FORCE_RX_FC	BIT(5)