[PATCH] media: em28xx: fix function pointer check

[trix]

From: Tom Rix <t...@redhat.com>

clang static analyzer reports this problem

em28xx-core.c:1162:4: warning: Called function pointer
  is null (null dereference)
        ops->suspend(dev->dev_next);
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~

This is the problem block

        if (ops->suspend)
                ops->suspend(dev);
        if (dev->dev_next)
                ops->suspend(dev->dev_next);

The check for ops->suspend only covers one statement.
So fix the check consistent with other similar in
the file.

Change a similar check in em28xx_resume_extension()
to use consistent logic as its siblings.

Fixes: be7fd3c3a8c5 ("media: em28xx: Hauppauge DualHD second tuner 
functionality")
Signed-off-by: Tom Rix <t...@redhat.com>
---
 drivers/media/usb/em28xx/em28xx-core.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/media/usb/em28xx/em28xx-core.c 
b/drivers/media/usb/em28xx/em28xx-core.c
index e6088b5d1b80..d60f4c2a661d 100644
--- a/drivers/media/usb/em28xx/em28xx-core.c
+++ b/drivers/media/usb/em28xx/em28xx-core.c
@@ -1156,10 +1156,11 @@ int em28xx_suspend_extension(struct em28xx *dev)
        dev_info(&dev->intf->dev, "Suspending extensions\n");
        mutex_lock(&em28xx_devlist_mutex);
        list_for_each_entry(ops, &em28xx_extension_devlist, next) {
-               if (ops->suspend)
+               if (ops->suspend) {
                        ops->suspend(dev);
-               if (dev->dev_next)
-                       ops->suspend(dev->dev_next);
+                       if (dev->dev_next)
+                               ops->suspend(dev->dev_next);
+               }
        }
        mutex_unlock(&em28xx_devlist_mutex);
        return 0;
@@ -1172,11 +1173,11 @@ int em28xx_resume_extension(struct em28xx *dev)
        dev_info(&dev->intf->dev, "Resuming extensions\n");
        mutex_lock(&em28xx_devlist_mutex);
        list_for_each_entry(ops, &em28xx_extension_devlist, next) {
-               if (!ops->resume)
-                       continue;
-               ops->resume(dev);
-               if (dev->dev_next)
-                       ops->resume(dev->dev_next);
+               if (ops->resume) {
+                       ops->resume(dev);
+                       if (dev->dev_next)
+                               ops->resume(dev->dev_next);
+               }
        }
        mutex_unlock(&em28xx_devlist_mutex);
        return 0;
-- 
2.18.1