linux-kernel - [PATCH net] net: dec: de2104x: Increase receive ring size for Tulip

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Message-Id: <20200910190509.81755-1-lucyyan@google.com>
Date:   Thu, 10 Sep 2020 12:05:09 -0700
From:   Lucy Yan <lucyyan@...gle.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Heiner Kallweit <hkallweit1@...il.com>,
        Arnd Bergmann <arnd@...db.de>, Moritz Fischer <mdf@...nel.org>,
        Lucy Yan <lucyyan@...gle.com>,
        Leon Romanovsky <leon@...nel.org>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Vaibhav Gupta <vaibhavgupta40@...il.com>,
        netdev@...r.kernel.org, linux-parisc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH net] net: dec: de2104x: Increase receive ring size for Tulip

Increase Rx ring size to address issue where hardware is reaching
the receive work limit.

Before:

[  102.223342] de2104x 0000:17:00.0 eth0: rx work limit reached
[  102.245695] de2104x 0000:17:00.0 eth0: rx work limit reached
[  102.251387] de2104x 0000:17:00.0 eth0: rx work limit reached
[  102.267444] de2104x 0000:17:00.0 eth0: rx work limit reached

Signed-off-by: Lucy Yan <lucyyan@...gle.com>
---
 drivers/net/ethernet/dec/tulip/de2104x.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/dec/tulip/de2104x.c b/drivers/net/ethernet/dec/tulip/de2104x.c
index cb116b530f5e..2610efe4f873 100644
--- a/drivers/net/ethernet/dec/tulip/de2104x.c
+++ b/drivers/net/ethernet/dec/tulip/de2104x.c
@@ -85,7 +85,7 @@ MODULE_PARM_DESC (rx_copybreak, "de2104x Breakpoint at which Rx packets are copi
 #define DSL			CONFIG_DE2104X_DSL
 #endif
 
-#define DE_RX_RING_SIZE		64
+#define DE_RX_RING_SIZE		128
 #define DE_TX_RING_SIZE		64
 #define DE_RING_BYTES		\
 		((sizeof(struct de_desc) * DE_RX_RING_SIZE) +	\
-- 
2.28.0.526.ge36021eeef-goog