linux-kernel - [PATCH] [media] bt8xx: Remove unnecessary self-assignment

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Message-Id: <20180915060612.21812-1-natechancellor@gmail.com>
Date:   Fri, 14 Sep 2018 23:06:13 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH] [media] bt8xx: Remove unnecessary self-assignment

Clang warns when a variable is assigned to itself.

drivers/media/pci/bt8xx/bttv-driver.c:2043:13: warning: explicitly
assigning value of variable of type '__s32' (aka 'int') to itself
[-Wself-assign]
        min_height = min_height;
        ~~~~~~~~~~ ^ ~~~~~~~~~~
1 warning generated.

There doesn't appear to be any good reason for this and this statement
was added in commit e5bd0260e7d3 ("V4L/DVB (5077): Bttv cropping
support") back in 2007. Just remove it.

Reported-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
---

I'm not sure if the comment should have been removed as well. If it
does, I can easily send a v2.

Thanks!

 drivers/media/pci/bt8xx/bttv-driver.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/media/pci/bt8xx/bttv-driver.c b/drivers/media/pci/bt8xx/bttv-driver.c
index 413bf287547c..b2cfcbb0008e 100644
--- a/drivers/media/pci/bt8xx/bttv-driver.c
+++ b/drivers/media/pci/bt8xx/bttv-driver.c
@@ -2040,7 +2040,6 @@ limit_scaled_size_lock       (struct bttv_fh *               fh,
 	max_width = max_width & width_mask;
 
 	/* Max. scale factor is 16:1 for frames, 8:1 for fields. */
-	min_height = min_height;
 	/* Min. scale factor is 1:1. */
 	max_height >>= !V4L2_FIELD_HAS_BOTH(field);
 
-- 
2.18.0