xen-pcifront: don't use flush_scheduled_work()

flush_scheduled_work() is scheduled for deprecation.  Cancel ->op_work
directly instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Ryan Wilson <hap9@epoch.ncsc.mil>
Cc: Jan Beulich <JBeulich@novell.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 3a5a6fc..030ce37 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -733,8 +733,7 @@
 
 	pcifront_free_roots(pdev);
 
-	/*For PCIE_AER error handling job*/
-	flush_scheduled_work();
+	cancel_work_sync(&pdev->op_work);
 
 	if (pdev->irq >= 0)
 		unbind_from_irqhandler(pdev->irq, pdev);