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 (file)
--- 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;
                }