linux-kernel - [patch] ASoC: Intel: do cast earlier in sst_cdev

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Message-ID: <20150409090239.GA17605@mwanda>
Date:	Thu, 9 Apr 2015 12:02:39 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Liam Girdwood <lgirdwood@...il.com>
Cc:	Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.de>,
	Vinod Koul <vinod.koul@...el.com>,
	"Subhransu S. Prusty" <subhransu.s.prusty@...el.com>,
	Jie Yang <yang.jie@...el.com>,
	Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] ASoC: Intel: do cast earlier in sst_cdev_tstamp()

My static checker complains about these because it looks like the
multiply can overflow and then we cast to a larger data type.  I don't
think this is a problem, but it's also harmless to do the cast earlier
so let's silence the static checker warning.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/sound/soc/intel/atom/sst/sst_drv_interface.c b/sound/soc/intel/atom/sst/sst_drv_interface.c
index 718838b..7b50a9d 100644
--- a/sound/soc/intel/atom/sst/sst_drv_interface.c
+++ b/sound/soc/intel/atom/sst/sst_drv_interface.c
@@ -381,7 +381,7 @@ static int sst_cdev_tstamp(struct device *dev, unsigned int str_id,
 	tstamp->copied_total = fw_tstamp.ring_buffer_counter;
 	tstamp->pcm_frames = fw_tstamp.frames_decoded;
 	tstamp->pcm_io_frames = div_u64(fw_tstamp.hardware_counter,
-			(u64)((stream->num_ch) * SST_GET_BYTES_PER_SAMPLE(24)));
+			(u64)stream->num_ch * SST_GET_BYTES_PER_SAMPLE(24));
 	tstamp->sampling_rate = fw_tstamp.sampling_frequency;
 
 	dev_dbg(dev, "PCM  = %u\n", tstamp->pcm_io_frames);
--
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