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

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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

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Boris Ostrovsky 2018-09-11 15:55:38 -04:00 • committed by Thomas Gleixner

parent 07e846bace

commit 6a92b11169

1 changed files with 8 additions and 2 deletions

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arch/x86/kernel/eisa.c

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