From 27430d19a91615245babaa9b216d0807636903a0 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Tue, 28 Feb 2017 18:14:37 -0300 Subject: [PATCH] [media] tw5864: use dev_warn instead of WARN to shut up warning tw5864_frameinterval_get() only initializes its output when it successfully identifies the video standard in tw5864_input. We get a warning here because gcc can't always track the state if initialized warnings across a WARN() macro, and thinks it might get used incorrectly in tw5864_s_parm: media/pci/tw5864/tw5864-video.c: In function 'tw5864_s_parm': media/pci/tw5864/tw5864-video.c:816:38: error: 'time_base.numerator' may be used uninitialized in this function [-Werror=maybe-uninitialized] media/pci/tw5864/tw5864-video.c:819:31: error: 'time_base.denominator' may be used uninitialized in this function [-Werror=maybe-uninitialized] Using dev_warn() instead of WARN() avoids the __branch_check__() in unlikely and lets the compiler see that the initialization is correct. Signed-off-by: Arnd Bergmann Acked-by: Andrey Utkin Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/pci/tw5864/tw5864-video.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/media/pci/tw5864/tw5864-video.c b/drivers/media/pci/tw5864/tw5864-video.c index 6d5ed8e4b941..2a044be729da 100644 --- a/drivers/media/pci/tw5864/tw5864-video.c +++ b/drivers/media/pci/tw5864/tw5864-video.c @@ -716,6 +716,8 @@ static void tw5864_frame_interval_set(struct tw5864_input *input) static int tw5864_frameinterval_get(struct tw5864_input *input, struct v4l2_fract *frameinterval) { + struct tw5864_dev *dev = input->root; + switch (input->std) { case STD_NTSC: frameinterval->numerator = 1001; @@ -727,8 +729,8 @@ static int tw5864_frameinterval_get(struct tw5864_input *input, frameinterval->denominator = 25; break; default: - WARN(1, "tw5864_frameinterval_get requested for unknown std %d\n", - input->std); + dev_warn(&dev->pci->dev, "tw5864_frameinterval_get requested for unknown std %d\n", + input->std); return -EINVAL; } -- 2.20.1