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

[ Upstream commit eb0f3bc463d59d86402f19c59aa44e82dc3fab6d ]

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: 4d5ae32f5e1e ("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>

diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c
index 16de0fa..5242687 100644 (file)
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -2451,8 +2451,8 @@ 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);
@@ -2507,25 +2507,25 @@ 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) {
+       if (ret)
+               goto unprepare;
+
+       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,
-                           "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;
-       }
+                           "PHY init failed, deferring to ifup time\n");
+       return 0;
 
-       port->netdev = NULL;
+unprepare:
+       clk_disable_unprepare(port->pclk);
        return ret;
 }