@@ -957,6 +957,11 @@ static void vsc73xx_mac_link_up(struct phylink_config *config,
if (duplex == DUPLEX_FULL)
val |= VSC73XX_MAC_CFG_FDX;
+ else
+ /* In datasheet description ("Port Mode Procedure" in 5.6.2)
+ * this bit is configured only for half duplex.
+ */
+ val |= VSC73XX_MAC_CFG_WEXC_DIS;
/* This routine is described in the datasheet (below ARBDISC register
* description)
@@ -967,7 +972,6 @@ static void vsc73xx_mac_link_up(struct phylink_config *config,
get_random_bytes(&seed, 1);
val |= seed << VSC73XX_MAC_CFG_SEED_OFFSET;
val |= VSC73XX_MAC_CFG_SEED_LOAD;
- val |= VSC73XX_MAC_CFG_WEXC_DIS;
/* Those bits are responsible for MTU only. Kernel takes care about MTU,
* let's enable +8 bytes frame length unconditionally.
According to the datasheet description ("Port Mode Procedure" in 5.6.2), the VSC73XX_MAC_CFG_WEXC_DIS bit is configured only for half duplex mode. The WEXC_DIS bit is responsible for MAC behavior after an excessive collision. Let's set it as described in the datasheet. Fixes: 05bd97fc559d ("net: dsa: Add Vitesse VSC73xx DSA router driver") Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com> --- v2: - Added 'Fixes' and 'Reviewed-by' to commit message. This patch came from net-next series[0]. Changes since net-next: - rebased to netdev/main only [0] https://patchwork.kernel.org/project/netdevbpf/patch/20240729210615.279952-6-paweldembicki@gmail.com/ --- drivers/net/dsa/vitesse-vsc73xx-core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)