[PATCH net] net: gemini: Fix another missing clk_disable_unprepare() in probe

[Dan Carpenter]

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.carpen...@oracle.com>
---
 drivers/net/ethernet/cortina/gemini.c | 34 +++++++++++++--------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/cortina/gemini.c 
b/drivers/net/ethernet/cortina/gemini.c
index 62e271aea4a5..ffec0f3dd957 100644
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -2446,8 +2446,8 @@ 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);
@@ -2502,25 +2502,25 @@ 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;
 }
 
-- 
2.28.0