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net: gemini: Fix another missing clk_disable_unprepare() in probe 

[ Upstream commit eb0f3bc463 ]

We recently added some calls to clk_disable_unprepare() but we missed
the last error path if register_netdev() fails.

I made a couple cleanups so we avoid mistakes like this in the future.
First I reversed the "if (!ret)" condition and pulled the code in one
indent level.  Also, the "port->netdev = NULL;" is not required because
"port" isn't used again outside this function so I deleted that line.

Fixes: 4d5ae32f5e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Dan Carpenter 2020-09-02 14:56:31 +03:00 committed by Greg Kroah-Hartman
parent 88405cf0f2
commit 612e2b7ec9
1 changed files with 18 additions and 18 deletions
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36
drivers/net/ethernet/cortina/gemini.c
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@ -2445,8 +2445,8 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
port->reset = devm_reset_control_get_exclusive(dev, NULL);
if (IS_ERR(port->reset)) {
dev_err(dev, "no reset\n");
clk_disable_unprepare(port->pclk);
return PTR_ERR(port->reset);
ret = PTR_ERR(port->reset);
goto unprepare;
}
reset_control_reset(port->reset);
usleep_range(100, 500);
@ -2501,25 +2501,25 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
IRQF_SHARED,
port_names[port->id],
port);
if (ret) {
clk_disable_unprepare(port->pclk);
return ret;
}
if (ret)
goto unprepare;
ret = register_netdev(netdev);
if (!ret) {
netdev_info(netdev,
"irq %d, DMA @ 0x%pap, GMAC @ 0x%pap\n",
port->irq, &dmares->start,
&gmacres->start);
ret = gmac_setup_phy(netdev);
if (ret)
netdev_info(netdev,
"PHY init failed, deferring to ifup time\n");
return 0;
}
if (ret)
goto unprepare;
port->netdev = NULL;
netdev_info(netdev,
"irq %d, DMA @ 0x%pap, GMAC @ 0x%pap\n",
port->irq, &dmares->start,
&gmacres->start);
ret = gmac_setup_phy(netdev);
if (ret)
netdev_info(netdev,
"PHY init failed, deferring to ifup time\n");
return 0;
unprepare:
clk_disable_unprepare(port->pclk);
return ret;
}