From: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
To: unlisted-recipients:; (no To-header on input)@casper.infradead.org
Cc: "Mauro Carvalho Chehab" <mchehab@osg.samsung.com>,
"Linux Media Mailing List" <linux-media@vger.kernel.org>,
"Mauro Carvalho Chehab" <mchehab@infradead.org>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Krzysztof Hałasa" <khalasa@piap.pl>,
"Hans Verkuil" <hans.verkuil@cisco.com>,
devel@driverdev.osuosl.org
Subject: [PATCH] [media] tw686x-kh: use the cached value
Date: Wed, 20 Apr 2016 13:41:04 -0300 [thread overview]
Message-ID: <13431509a41889a70cc76b31180f63fd10d0a5b3.1461170447.git.mchehab@osg.samsung.com> (raw)
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@osg.samsung.com>
---
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
reply other threads:[~2016-04-20 16:42 UTC|newest]
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