tree 1201992d50a5b4f9249d21b8d65115402c314df1
parent 220bf991b0366cc50a94feede3d7341fa5710ee4
author Rafael J. Wysocki <rjw@sisk.pl> 1269204711 +0100
committer Linus Torvalds <torvalds@linux-foundation.org> 1269277039 -0700

x86 / perf: Fix suspend to RAM on HP nx6325

Commit 3f6da3905398826d85731247e7fbcf53400c18bd
(perf: Rework and fix the arch CPU-hotplug hooks) broke suspend to
RAM on my HP nx6325 (and most likely on other AMD-based boxes too)
by allowing amd_pmu_cpu_offline() to be executed for CPUs that are
going offline as part of the suspend process.  The problem is that
cpuhw->amd_nb may be NULL already, so the function should make sure
it's not NULL before accessing the object pointed to by it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>