Revert "staging: gasket: core: hold reference to pci_dev while used"

There's no need to take an additional reference on the pci_dev structure
for the pointer copy saved in gasket data structures.

This reverts commit:
8dd8a48b ("staging: gasket: core: hold reference to pci_dev while used")
Reported-by: Dmitry Torokhov <dtor@chromium.org>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gasket/gasket_core.c

@@ -255,7 +255,6 @@ static void gasket_free_dev(struct gasket_dev *gasket_dev)
 	internal_desc->devs[gasket_dev->dev_idx] = NULL;
 	mutex_unlock(&internal_desc->mutex);
 	put_device(gasket_dev->dev);
-	pci_dev_put(gasket_dev->pci_dev);
 	kfree(gasket_dev);
 }
 
@@ -1477,7 +1476,7 @@ static int gasket_pci_probe(struct pci_dev *pci_dev,
 	ret = gasket_alloc_dev(internal_desc, parent, &gasket_dev, kobj_name);
 	if (ret)
 		return ret;
-	gasket_dev->pci_dev = pci_dev_get(pci_dev);
+	gasket_dev->pci_dev = pci_dev;
 	if (IS_ERR_OR_NULL(gasket_dev->dev_info.device)) {
 		pr_err("Cannot create %s device %s [ret = %ld]\n",
 		       driver_desc->name, gasket_dev->dev_info.name,