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xen: fixes for 4.15-rc3 

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Merge tag 'for-linus-4.15-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen fixes from Juergen Gross:
 "Just two small fixes for the new pvcalls frontend driver"

* tag 'for-linus-4.15-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/pvcalls: Fix a check in pvcalls_front_remove()
  xen/pvcalls: check for xenbus_read() errors
This commit is contained in:
Linus Torvalds 2017-12-08 12:53:43 -08:00
parent d90696ed61 1ab134ca31
commit 32abeb09ab
1 changed files with 3 additions and 1 deletions
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4
drivers/xen/pvcalls-front.c
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@ -1103,7 +1103,7 @@ static int pvcalls_front_remove(struct xenbus_device *dev)
kfree(map);
}
}
if (bedata->ref >= 0)
if (bedata->ref != -1)
gnttab_end_foreign_access(bedata->ref, 0, 0);
kfree(bedata->ring.sring);
kfree(bedata);
@ -1128,6 +1128,8 @@ static int pvcalls_front_probe(struct xenbus_device *dev,
}
versions = xenbus_read(XBT_NIL, dev->otherend, "versions", &len);
if (IS_ERR(versions))
return PTR_ERR(versions);
if (!len)
return -EINVAL;
if (strcmp(versions, "1")) {