From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 7 Aug 2007 09:51:19 +0000 (+0900)
Subject: sh: intc: Fix sense regs oops for IRL IRQs.
X-Git-Tag: firefly_0821_release~25993^2~104
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6d64d4256cccd3a452ebd8c37a1d41e2d5dab8c6;p=firefly-linux-kernel-4.4.55.git

sh: intc: Fix sense regs oops for IRL IRQs.

IRL doesn't always define sense registers, so don't bother trying to
iterate through the table. This ended up causing an oops on SH-X3
when using IRL mode.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---

diff --git a/arch/sh/kernel/cpu/irq/intc.c b/arch/sh/kernel/cpu/irq/intc.c
index a25f70dd6ad7..56819409a36a 100644
--- a/arch/sh/kernel/cpu/irq/intc.c
+++ b/arch/sh/kernel/cpu/irq/intc.c
@@ -218,7 +218,7 @@ static int intc_set_sense(unsigned int irq, unsigned int type)
 		break;
 	}
 
-	if (!enum_id || !value)
+	if (!enum_id || !value || !desc->sense_regs)
 		return -EINVAL;
 
 	value ^= VALID(0);