net: smc91x: Fix possible memory leak in smc_drv_probe()

[ Upstream commit bca9749 ]

If try_toggle_control_gpio() failed in smc_drv_probe(), free_netdev(ndev)
should be called to free the ndev created earlier. Otherwise, a memleak
will occur.

Fixes: 7d2911c ("net: smc91x: Fix gpios for device tree based booting")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/net/ethernet/smsc/smc91x.c

@@ -2287,7 +2287,7 @@ static int smc_drv_probe(struct platform_device *pdev)
  ret = try_toggle_control_gpio(&pdev->dev, &lp->power_gpio,
  "power", 0, 0, 100);
  if (ret)
- return ret;
+ goto out_free_netdev;
 
  /*
  * Optional reset GPIO configured? Minimum 100 ns reset needed
@@ -2296,7 +2296,7 @@ static int smc_drv_probe(struct platform_device *pdev)
  ret = try_toggle_control_gpio(&pdev->dev, &lp->reset_gpio,
  "reset", 0, 0, 100);
  if (ret)
- return ret;
+ goto out_free_netdev;
 
  /*
  * Need to wait for optional EEPROM to load, max 750 us according