From 6a3f084971bad985722afe25b16a5c0a990cea75 Mon Sep 17 00:00:00 2001
From: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Date: Mon, 2 Jun 2008 09:22:34 -0700
Subject: pciehp: removes redundant NULL write to slot status register

Cleanup to remove a redundant NULL write to SLOTSTATUS.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

diff --git a/drivers/pci/hotplug/pciehp_hpc.c b/drivers/pci/hotplug/pciehp_hpc.c
index eeb517b..0cfaedf 100644
--- a/drivers/pci/hotplug/pciehp_hpc.c
+++ b/drivers/pci/hotplug/pciehp_hpc.c
@@ -777,7 +777,7 @@ static irqreturn_t pcie_isr(int irq, void *dev_id)
 		intr_loc |= detected;
 		if (!intr_loc)
 			return IRQ_NONE;
-		if (pciehp_writew(ctrl, SLOTSTATUS, detected)) {
+		if (detected && pciehp_writew(ctrl, SLOTSTATUS, detected)) {
 			err("%s: Cannot write to SLOTSTATUS\n", __func__);
 			return IRQ_NONE;
 		}
-- 
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