[PATCH v3] rapidio/tsi721: Replace flush_scheduled_work() with flush_work().

[Tetsuo Handa]

Like commit c4f135d643823a86 ("workqueue: Wrap flush_workqueue() using a
macro") says, flush_scheduled_work() is dangerous and will be forbidden.
We are on the way for removing all flush_scheduled_work() callers from
the kernel, and this patch is for removing flush_scheduled_work() call
 from tsi721 driver.

Since "struct tsi721_device" is per a device struct, I assume that
tsi721_remove() needs to wait for only two works associated with that
device. Therefore, wait for only these works using flush_work().

Signed-off-by: Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>
---
Since no response from RAPIDIO SUBSYSTEM maintainers for more than three months (
https://lkml.kernel.org/r/ad924306-d15c-9f1e-13dc-eaf674878022@xxxxxxxxxxxxxxxxxxx
https://lkml.kernel.org/r/8347375e-29fd-cd45-2b07-5504c9ddbd0c@xxxxxxxxxxxxxxxxxxx
), I route this patch to Andrew Morton.

Changes in v3:
  Update description.

Changes in v2:
  Use flush_work() instead of introducing a dedicated WQ.

 drivers/rapidio/devices/tsi721.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index b3134744fb55..0a42d6a2af24 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -2941,7 +2941,8 @@ static void tsi721_remove(struct pci_dev *pdev)
 
 	tsi721_disable_ints(priv);
 	tsi721_free_irq(priv);
-	flush_scheduled_work();
+	flush_work(&priv->idb_work);
+	flush_work(&priv->pw_work);
 	rio_unregister_mport(&priv->mport);
 
 	tsi721_unregister_dma(priv);
-- 
2.18.4