Char/Misc driver fixes for 4.2-rc4

Here are some char and misc driver fixes for reported issues.  One
 parport patch is reverted as it was incorrect, thanks to testing by the
 0-day bot.
 
 Full details in the shortlog below.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iEYEABECAAYFAlW0Q20ACgkQMUfUDdst+ym87QCgmJ29k4J3T8xO77IfPHssXVuz
 TWMAn2nOW9lnatejcd8h5PG5v4hjzdjL
 =Rjcy
 -----END PGP SIGNATURE-----

Merge tag 'char-misc-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some char and misc driver fixes for reported issues.

  One parport patch is reverted as it was incorrect, thanks to testing
  by the 0-day bot"

* tag 'char-misc-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  parport: Revert "parport: fix memory leak"
  mei: prevent unloading mei hw modules while the device is opened.
  misc: mic: scif bug fix for vmalloc_to_page crash
  parport: fix freeing freed memory
  parport: fix memory leak
  parport: fix error handling

drivers/misc/mei/main.c

@@ -682,7 +682,7 @@ int mei_register(struct mei_device *dev, struct device *parent)
 	/* Fill in the data structures */
 	devno = MKDEV(MAJOR(mei_devt), dev->minor);
 	cdev_init(&dev->cdev, &mei_fops);
-	dev->cdev.owner = mei_fops.owner;
+	dev->cdev.owner = parent->driver->owner;
 
 	/* Add the device */
 	ret = cdev_add(&dev->cdev, devno, 1);

drivers/misc/mic/scif/scif_nodeqp.c

@@ -357,7 +357,7 @@ static void scif_p2p_freesg(struct scatterlist *sg)
 }
 
 static struct scatterlist *
-scif_p2p_setsg(void __iomem *va, int page_size, int page_cnt)
+scif_p2p_setsg(phys_addr_t pa, int page_size, int page_cnt)
 {
 	struct scatterlist *sg;
 	struct page *page;
@@ -368,16 +368,11 @@ scif_p2p_setsg(void __iomem *va, int page_size, int page_cnt)
 		return NULL;
 	sg_init_table(sg, page_cnt);
 	for (i = 0; i < page_cnt; i++) {
-		page = vmalloc_to_page((void __force *)va);
-		if (!page)
-			goto p2p_sg_err;
+		page = pfn_to_page(pa >> PAGE_SHIFT);
 		sg_set_page(&sg[i], page, page_size, 0);
-		va += page_size;
+		pa += page_size;
 	}
 	return sg;
-p2p_sg_err:
-	kfree(sg);
-	return NULL;
 }
 
 /* Init p2p mappings required to access peerdev from scifdev */
@@ -395,14 +390,14 @@ scif_init_p2p_info(struct scif_dev *scifdev, struct scif_dev *peerdev)
 	p2p = kzalloc(sizeof(*p2p), GFP_KERNEL);
 	if (!p2p)
 		return NULL;
-	p2p->ppi_sg[SCIF_PPI_MMIO] = scif_p2p_setsg(psdev->mmio->va,
+	p2p->ppi_sg[SCIF_PPI_MMIO] = scif_p2p_setsg(psdev->mmio->pa,
 						    PAGE_SIZE, num_mmio_pages);
 	if (!p2p->ppi_sg[SCIF_PPI_MMIO])
 		goto free_p2p;
 	p2p->sg_nentries[SCIF_PPI_MMIO] = num_mmio_pages;
 	sg_page_shift = get_order(min(psdev->aper->len, (u64)(1 << 30)));
 	num_aper_chunks = num_aper_pages >> (sg_page_shift - PAGE_SHIFT);
-	p2p->ppi_sg[SCIF_PPI_APER] = scif_p2p_setsg(psdev->aper->va,
+	p2p->ppi_sg[SCIF_PPI_APER] = scif_p2p_setsg(psdev->aper->pa,
 						    1 << sg_page_shift,
 						    num_aper_chunks);
 	p2p->sg_nentries[SCIF_PPI_APER] = num_aper_chunks;

drivers/parport/share.c

@@ -891,8 +891,10 @@ parport_register_dev_model(struct parport *port, const char *name,
 	par_dev->dev.release = free_pardevice;
 	par_dev->devmodel = true;
 	ret = device_register(&par_dev->dev);
-	if (ret)
-		goto err_put_dev;
+	if (ret) {
+		put_device(&par_dev->dev);
+		goto err_put_port;
+	}
 
 	/* Chain this onto the list */
 	par_dev->prev = NULL;
@@ -907,7 +909,8 @@ parport_register_dev_model(struct parport *port, const char *name,
 			spin_unlock(&port->physport->pardevice_lock);
 			pr_debug("%s: cannot grant exclusive access for device %s\n",
 				 port->name, name);
-			goto err_put_dev;
+			device_unregister(&par_dev->dev);
+			goto err_put_port;
 		}
 		port->flags |= PARPORT_FLAG_EXCL;
 	}
@@ -938,8 +941,6 @@ parport_register_dev_model(struct parport *port, const char *name,
 
 	return par_dev;
 
-err_put_dev:
-	put_device(&par_dev->dev);
 err_free_devname:
 	kfree(devname);
 err_free_par_dev: