PCI: switchtec: Fix an error handling path in switchtec_pci_probe()

[ Upstream commit dec529b ]

The commit in Fixes changed the logic on how resources are released and
introduced a new switchtec_exit_pci() that need to be called explicitly in
order to undo a corresponding switchtec_init_pci().

This was done in the remove function, but not in the probe.

Fix the probe now.

Fixes: df25461 ("PCI: switchtec: Fix stdev_release() crash after surprise hot remove")
Link: https://lore.kernel.org/r/01446d2ccb91a578239915812f2b7dfbeb2882af.1703428183.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

drivers/pci/switch/switchtec.c

@@ -1614,7 +1614,7 @@ static int switchtec_pci_probe(struct pci_dev *pdev,
  rc = switchtec_init_isr(stdev);
  if (rc) {
  dev_err(&stdev->dev, "failed to init isr.\n");
- goto err_put;
+ goto err_exit_pci;
  }
 
  iowrite32(SWITCHTEC_EVENT_CLEAR |
@@ -1635,6 +1635,8 @@ static int switchtec_pci_probe(struct pci_dev *pdev,
 
 err_devadd:
  stdev_kill(stdev);
+err_exit_pci:
+ switchtec_exit_pci(stdev);
 err_put:
  ida_simple_remove(&switchtec_minor_ida, MINOR(stdev->dev.devt));
  put_device(&stdev->dev);