linux-kernel - [PATCH RFC] staging: media: davinci_vpfe: drop condition with no effect

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Date:	Mon, 26 Jan 2015 08:27:05 +0100
From:	Nicholas Mc Guire <der.herr@...r.at>
To:	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Hans Verkuil <hans.verkuil@...co.com>,
	Lad Prabhakar <prabhakar.csengg@...il.com>,
	Jiayi Ye <yejiayily@...il.com>,
	Tapasweni Pathak <tapaswenipathak@...il.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org, Nicholas Mc Guire <der.herr@...r.at>
Subject: [PATCH RFC] staging: media: davinci_vpfe: drop condition with no effect

As the if and else branch body are identical the condition has no effect and 
can be dropped.

Signed-off-by: Nicholas Mc Guire <der.herr@...r.at>
---

As the if and the else branch of the inner conditional paths are the same
the condition is without effect. Given the comments indicate that
the else branch *should* be handling a specific case this may indicate
a bug, in which case the below patch is *wrong*. This needs a review by
someone that knows the specifics of this driver.

If the inner if/else is a placeholder for planed updates then it should
be commented so this is clear.

Patch was only compile tested with davinci_all_defconfig + CONFIG_STAGING=y
CONFIG_STAGING_MEDIA=y, CONFIG_MEDIA_SUPPORT=m,
CONFIG_MEDIA_ANALOG_TV_SUPPORT=y, CONFIG_MEDIA_CAMERA_SUPPORT=y
CONFIG_MEDIA_CONTROLLER=y, CONFIG_VIDEO_V4L2_SUBDEV_API=y
CONFIG_VIDEO_DM365_VPFE=m

Patch is against 3.0.19-rc5 -next-20150123

 drivers/staging/media/davinci_vpfe/dm365_resizer.c |    9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/media/davinci_vpfe/dm365_resizer.c b/drivers/staging/media/davinci_vpfe/dm365_resizer.c
index 75e70e1..bf2cb7a 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_resizer.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_resizer.c
@@ -63,16 +63,11 @@ resizer_calculate_line_length(u32 pix, int width, int height,
 	if (pix == MEDIA_BUS_FMT_UYVY8_2X8 ||
 	    pix == MEDIA_BUS_FMT_SGRBG12_1X12) {
 		*line_len = width << 1;
-	} else if (pix == MEDIA_BUS_FMT_Y8_1X8 ||
-		   pix == MEDIA_BUS_FMT_UV8_1X8) {
-		*line_len = width;
-		*line_len_c = width;
-	} else {
-		/* YUV 420 */
-		/* round width to upper 32 byte boundary */
+	} else { 
 		*line_len = width;
 		*line_len_c = width;
 	}
+
 	/* adjust the line len to be a multiple of 32 */
 	*line_len += 31;
 	*line_len &= ~0x1f;
-- 
1.7.10.4

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