the dma_requests field is cached, but cache is not used:
drivers/staging/media/tw686x-kh/tw686x-kh-video.c: In function 'tw686x_video_irq':
drivers/staging/media/tw686x-kh/tw686x-kh-video.c:622:6: warning: variable 'requests' set but not used [-Wunused-but-set-variable]
u32 requests;
^
Use the cache instead, as it seems reading it needs to be done
with spin lock taken.
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
---
drivers/staging/media/tw686x-kh/tw686x-kh-video.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/media/tw686x-kh/tw686x-kh-video.c b/drivers/staging/media/tw686x-kh/tw686x-kh-video.c
index 2fbc3cbd9eb0..0650c29f78eb 100644
--- a/drivers/staging/media/tw686x-kh/tw686x-kh-video.c
+++ b/drivers/staging/media/tw686x-kh/tw686x-kh-video.c
@@ -625,7 +625,7 @@ int tw686x_video_irq(struct tw686x_dev *dev)
requests = dev->dma_requests;
spin_unlock_irqrestore(&dev->irq_lock, flags);
- if (dev->dma_requests & dev->video_active) {
+ if (requests & dev->video_active) {
wake_up_interruptible_all(&dev->video_thread_wait);
handled = 1;
}
--
2.5.5
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