From: Andrew Lunn <andrew@lunn.ch>
To: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 net-next 01/10] net: korina: Fix MDIO functions
Date: Fri, 16 Apr 2021 01:17:54 +0200 [thread overview]
Message-ID: <YHjJotQ9vQ03KZSH@lunn.ch> (raw)
In-Reply-To: <20210414230648.76129-2-tsbogend@alpha.franken.de>
> +static int korina_mdio_wait(struct korina_private *lp)
> +{
> + u32 value;
> +
> + return readl_poll_timeout_atomic(&lp->eth_regs->miimind,
> + value, value & ETH_MII_IND_BSY,
> + 1, 1000);
> +}
> +
> +static int korina_mdio_read(struct net_device *dev, int phy, int reg)
> {
> struct korina_private *lp = netdev_priv(dev);
> int ret;
>
> - mii_id = ((lp->rx_irq == 0x2c ? 1 : 0) << 8);
> + if (korina_mdio_wait(lp))
> + return -ETIMEDOUT;
>
> - writel(0, &lp->eth_regs->miimcfg);
> - writel(0, &lp->eth_regs->miimcmd);
> - writel(mii_id | reg, &lp->eth_regs->miimaddr);
> - writel(ETH_MII_CMD_SCN, &lp->eth_regs->miimcmd);
> + writel(phy << 8 | reg, &lp->eth_regs->miimaddr);
> + writel(1, &lp->eth_regs->miimcmd);
> +
> + if (korina_mdio_wait(lp))
> + return -ETIMEDOUT;
Just return what readl_poll_timeout_atomic() returns. In general, you
should not change error codes.
>
> - ret = (int)(readl(&lp->eth_regs->miimrdd));
> + if (readl(&lp->eth_regs->miimind) & ETH_MII_IND_NV)
> + return -1;
Please use -ESOMETHING, not -1.
Andrew
next prev parent reply other threads:[~2021-04-15 23:18 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-14 23:06 [PATCH v3 net-next 00/10] net: Korina improvements Thomas Bogendoerfer
2021-04-14 23:06 ` [PATCH v3 net-next 01/10] net: korina: Fix MDIO functions Thomas Bogendoerfer
2021-04-15 23:17 ` Andrew Lunn [this message]
2021-04-14 23:06 ` [PATCH v3 net-next 02/10] net: korina: Use devres functions Thomas Bogendoerfer
2021-04-15 23:19 ` Andrew Lunn
2021-04-14 23:06 ` [PATCH v3 net-next 03/10] net: korina: Remove not needed cache flushes Thomas Bogendoerfer
2021-04-15 23:20 ` Andrew Lunn
2021-04-14 23:06 ` [PATCH v3 net-next 04/10] net: korina: Remove nested helpers Thomas Bogendoerfer
2021-04-15 23:21 ` Andrew Lunn
2021-04-14 23:06 ` [PATCH v3 net-next 05/10] net: korina: Use DMA API Thomas Bogendoerfer
2021-04-15 23:23 ` Andrew Lunn
2021-04-14 23:06 ` [PATCH v3 net-next 06/10] net: korina: Only pass mac address via platform data Thomas Bogendoerfer
2021-04-15 23:30 ` Andrew Lunn
2021-04-16 6:54 ` Thomas Bogendoerfer
2021-04-14 23:06 ` [PATCH v3 net-next 07/10] net: korina: Add support for device tree Thomas Bogendoerfer
2021-04-15 23:49 ` Andrew Lunn
2021-04-16 7:12 ` Thomas Bogendoerfer
2021-04-14 23:06 ` [PATCH v3 net-next 08/10] net: korina: Get mdio input clock via common clock framework Thomas Bogendoerfer
2021-04-15 23:52 ` Andrew Lunn
2021-04-14 23:06 ` [PATCH v3 net-next 09/10] net: korina: Make driver COMPILE_TESTable Thomas Bogendoerfer
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