tree f5fee0c92b515b594ec2d3a6c0b246608b445443
parent 07e846bace717729fd20b5d99521a5f8c7d7a9cb
author Boris Ostrovsky <boris.ostrovsky@oracle.com> 1536695738 -0400
committer Thomas Gleixner <tglx@linutronix.de> 1536701810 +0200

x86/EISA: Don't probe EISA bus for Xen PV guests

For unprivileged Xen PV guests this is normal memory and ioremap will
not be able to properly map it.

While at it, since ioremap may return NULL, add a test for pointer's
validity.

Reported-by: Andy Smith <andy@strugglers.net>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: hpa@zytor.com
Cc: xen-devel@lists.xenproject.org
Cc: jgross@suse.com
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20180911195538.23289-1-boris.ostrovsky@oracle.com