From: Ansuel Smith <ansuelsmth@gmail.com>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: Ansuel Smith <ansuelsmth@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
Russell King <linux@armlinux.org.uk>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [RFC PATCH net-next v2 03/17] net: mdio: ipq8064: enlarge sleep after read/write operation
Date: Mon, 3 May 2021 01:06:55 +0200 [thread overview]
Message-ID: <20210502230710.30676-3-ansuelsmth@gmail.com> (raw)
In-Reply-To: <20210502230710.30676-1-ansuelsmth@gmail.com>
With the use of the qca8k dsa driver, some problem arised related to
port status detection. With a load on a specific port (for example a
simple speed test), the driver starts to behave in a strange way and
garbage data is produced. To address this, enlarge the sleep delay and
address a bug for the reg offset 31 that require additional delay for
this specific reg.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/net/mdio/mdio-ipq8064.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/net/mdio/mdio-ipq8064.c b/drivers/net/mdio/mdio-ipq8064.c
index 8ae5379eda9d..bba2fb0d6af8 100644
--- a/drivers/net/mdio/mdio-ipq8064.c
+++ b/drivers/net/mdio/mdio-ipq8064.c
@@ -65,7 +65,7 @@ ipq8064_mdio_read(struct mii_bus *bus, int phy_addr, int reg_offset)
((reg_offset << MII_REG_SHIFT) & MII_REG_MASK);
writel(miiaddr, priv->base + MII_ADDR_REG_ADDR);
- usleep_range(8, 10);
+ usleep_range(10, 13);
err = ipq8064_mdio_wait_busy(priv);
if (err)
@@ -90,7 +90,14 @@ ipq8064_mdio_write(struct mii_bus *bus, int phy_addr, int reg_offset, u16 data)
((reg_offset << MII_REG_SHIFT) & MII_REG_MASK);
writel(miiaddr, priv->base + MII_ADDR_REG_ADDR);
- usleep_range(8, 10);
+
+ /* For the specific reg 31 extra time is needed or the next
+ * read will produce garbage data.
+ */
+ if (reg_offset == 31)
+ usleep_range(30, 43);
+ else
+ usleep_range(10, 13);
return ipq8064_mdio_wait_busy(priv);
}
--
2.30.2
next prev parent reply other threads:[~2021-05-02 23:07 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-02 23:06 [RFC PATCH net-next v2 01/17] net: mdio: ipq8064: clean whitespaces in define Ansuel Smith
2021-05-02 23:06 ` [RFC PATCH net-next v2 02/17] net: mdio: ipq8064: switch to write/readl function Ansuel Smith
2021-05-03 12:49 ` Andrew Lunn
2021-05-03 14:24 ` Ansuel Smith
2021-05-03 14:44 ` Andrew Lunn
2021-05-02 23:06 ` Ansuel Smith [this message]
2021-05-02 23:06 ` [RFC PATCH net-next v2 04/17] net: dsa: qca8k: rework read/write/set_page to provide error Ansuel Smith
2021-05-02 23:06 ` [RFC PATCH net-next v2 05/17] net: dsa: qca8k: add support for qca8327 switch Ansuel Smith
2021-05-02 23:06 ` [RFC PATCH net-next v2 06/17] devicetree: net: dsa: qca8k: Document new compatible qca8327 Ansuel Smith
2021-05-02 23:06 ` [RFC PATCH net-next v2 07/17] net: dsa: qca8k: add priority tweak to qca8337 switch Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 08/17] net: dsa: qca8k: add GLOBAL_FC settings needed for qca8327 Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 09/17] net: dsa: qca8k: add support for switch rev Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 10/17] net: dsa: qca8k: make rgmii delay configurable Ansuel Smith
2021-05-03 0:54 ` Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 11/17] net: dsa: qca8k: clear MASTER_EN after phy read/write Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 12/17] net: dsa: qca8k: dsa: qca8k: protect MASTER busy_wait with mdio mutex Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 13/17] net: dsa: qca8k: enlarge mdio delay and timeout Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 14/17] net: phy: phylink: permit to pass dev_flags to phylink_connect_phy Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 15/17] net: dsa: slave: pass dev_flags also to internal PHY Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 16/17] net: dsa: qca8k: pass switch_revision info to phy dev_flags Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 17/17] net: phy: add qca8k driver for qca8k switch internal PHY Ansuel Smith
2021-05-02 23:07 ` [RFC PATCH net-next v2 00/17] Multiple improvement to qca8k stability Ansuel Smith
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