From 5fa3e10cec85ddd12d31af14f9fce6c3c0ff37d0 Mon Sep 17 00:00:00 2001
From: Hanyuan Zhao <hanyuan-z@qq.com>
Date: Fri, 9 Aug 2024 16:56:59 +0800
Subject: [PATCH] net: dc2114x: allow users to decide whether to detect the tx
No Carrier errors
Some IP cores of dc2114x or its variants do not comply so well with
the behaviors described by the official document. A packet could be
sent successfully but reported with No Carrier error. Latest drivers
of this IP core have not detect this error anymore.
Signed-off-by: Hanyuan Zhao <zhaohy22@mails.tsinghua.edu.cn>
---
drivers/net/Kconfig | 11 +++++++++++
drivers/net/dc2114x.c | 2 ++
2 files changed, 13 insertions(+)
diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig
index e27b4a78cd..804f4b09a2 100644
--- a/drivers/net/Kconfig
+++ b/drivers/net/Kconfig
@@ -770,6 +770,17 @@ config TULIP_SUPPORT_NON_PCI
Say Y to this and you can run this driver on platforms that do not
have PCI controllers.
+config TULIP_IGNORE_TX_NO_CARRIER
+ bool "Ignore tx no carrier error"
+ depends on TULIP
+ default n
+ help
+ Some IP cores of dc2114x or its variants do not comply so well with
+ the behaviors described by the official document. A packet could be
+ sent successfully but reported with No Carrier error. Latest drivers
+ of this IP core do not detect this error anymore. Say Y to this could
+ disable handling of this error.
+
config XILINX_AXIEMAC
select PHYLIB
select MII
diff --git a/drivers/net/dc2114x.c b/drivers/net/dc2114x.c
index 8a285742a1..dc28712221 100644
--- a/drivers/net/dc2114x.c
+++ b/drivers/net/dc2114x.c
@@ -371,7 +371,9 @@ static int dc21x4x_send_common(struct dc2114x_priv *priv, void *packet, int leng
if (le32_to_cpu(priv->tx_ring[priv->tx_new].status) & TD_ES) {
priv->tx_ring[priv->tx_new].status = 0x0;
+#if !CONFIG_IS_ENABLED(TULIP_IGNORE_TX_NO_CARRIER)
goto done;
+#endif
}
status = length;
--
2.39.5