media/video: explicitly flush request_module work

Video drivers request submodules using a work during probe and calls
flush_scheduled_work() on exit to make sure the work is complete
before being unloaded.  This patch makes these drivers flush the work
directly instead of using flush_scheduled_work().

While at it, relocate request_submodules() call in saa7134_initdev()
right right before successful return as in other drivers to avoid
failing after the work is scheduled and returning failure without the
work still active.

This is in preparation for the deprecation of flush_scheduled_work().

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/media/video/cx18/cx18-driver.c b/drivers/media/video/cx18/cx18-driver.c
index df60f27337cf..f6fdcfb1084b 100644
--- a/drivers/media/video/cx18/cx18-driver.c
+++ b/drivers/media/video/cx18/cx18-driver.c
@@ -266,8 +266,14 @@ static void request_modules(struct cx18 *dev)
         INIT_WORK(&dev->request_module_wk, request_module_async);
         schedule_work(&dev->request_module_wk);
 }
+
+static void flush_request_modules(struct cx18 *dev)
+{
+        flush_work_sync(&dev->request_module_wk);
+}
 #else
 #define request_modules(dev)
+#define flush_request_modules(dev)
 #endif /* CONFIG_MODULES */
 
 /* Generic utility functions */
@@ -1226,6 +1232,8 @@ static void cx18_remove(struct pci_dev *pci_dev)
 
         CX18_DEBUG_INFO("Removing Card\n");
 
+        flush_request_modules(cx);
+
         /* Stop all captures */
         CX18_DEBUG_INFO("Stopping all streams\n");
         if (atomic_read(&cx->tot_capturing) > 0)