linux-kernel - [PATCH 3.16 038/192] drm/msm/hdmi: Use bitwise operators when building register values

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Message-ID: <lsq.1507553064.634451328@decadent.org.uk>
Date:   Mon, 09 Oct 2017 13:44:24 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Liviu Dudau" <liviu.dudau@....com>,
        "Liviu Dudau" <Liviu.Dudau@....com>,
        "Rob Clark" <robdclark@...il.com>
Subject: [PATCH 3.16 038/192] drm/msm/hdmi: Use bitwise operators when
 building register values

3.16.49-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Liviu Dudau <Liviu.Dudau@....com>

commit ffe8f53f9cc73fb25c8f78d4aed7ddf285503a60 upstream.

Commit c0c0d9eeeb8d ("drm/msm: hdmi audio support") uses logical
OR operators to build up a value to be written in the
REG_HDMI_AUDIO_INFO0 and REG_HDMI_AUDIO_INFO1 registers when it
should have used bitwise operators.

Signed-off-by: Liviu Dudau <liviu.dudau@....com>
Fixes: c0c0d9eeeb8d ("drm/msm: hdmi audio support")
Signed-off-by: Rob Clark <robdclark@...il.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/gpu/drm/msm/hdmi/hdmi_audio.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_audio.c
@@ -182,10 +182,10 @@ int hdmi_audio_update(struct hdmi *hdmi)
 		/* configure infoframe: */
 		hdmi_audio_infoframe_pack(info, buf, sizeof(buf));
 		hdmi_write(hdmi, REG_HDMI_AUDIO_INFO0,
-				(buf[3] <<  0) || (buf[4] <<  8) ||
-				(buf[5] << 16) || (buf[6] << 24));
+				(buf[3] <<  0) | (buf[4] <<  8) |
+				(buf[5] << 16) | (buf[6] << 24));
 		hdmi_write(hdmi, REG_HDMI_AUDIO_INFO1,
-				(buf[7] <<  0) || (buf[8] << 8));
+				(buf[7] <<  0) | (buf[8] << 8));
 
 		hdmi_write(hdmi, REG_HDMI_GC, 0);