From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Thu, 29 Sep 2011 17:31:21 +0000 (-0400)
Subject: xen/events: BUG() when we can't allocate our event->irq array.
X-Git-Tag: upstream/snapshot3+hdmi~8953^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=9d093e2958baf76154d1008339f594f798a52790;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

xen/events: BUG() when we can't allocate our event->irq array.

In case we can't allocate we are doomed. We should BUG_ON
instead of trying to dereference it later on.

Acked-by: Ian Campbell <ian.campbell@citrix.com>
[v1: Use BUG_ON instead of BUG]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 7523719..6b002cc 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -1670,6 +1670,7 @@ void __init xen_init_IRQ(void)
 
 	evtchn_to_irq = kcalloc(NR_EVENT_CHANNELS, sizeof(*evtchn_to_irq),
 				    GFP_KERNEL);
+	BUG_ON(!evtchn_to_irq);
 	for (i = 0; i < NR_EVENT_CHANNELS; i++)
 		evtchn_to_irq[i] = -1;