This patch removes redundant NULL write to slot status register.

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

---
 drivers/pci/hotplug/pciehp_hpc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.25/drivers/pci/hotplug/pciehp_hpc.c
===================================================================
--- linux-2.6.25.orig/drivers/pci/hotplug/pciehp_hpc.c
+++ linux-2.6.25/drivers/pci/hotplug/pciehp_hpc.c
@@ -741,7 +741,7 @@ static irqreturn_t pcie_isr(int irq, voi
 		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;
 		}