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From: Dan Carpenter <dan.carpenter@oracle.com>
To: zajec5@gmail.com
Cc: b43-dev@lists.infradead.org, linux-wireless@vger.kernel.org
Subject: (bug report) b43: precendence error
Date: Thu, 26 Nov 2015 14:58:43 +0300	[thread overview]
Message-ID: <20151126115843.GH10556@mwanda> (raw)

[ All the old wireless Smatch warnings are showing up as new ones
  because of the path reshuffle in linux-next.  I'm going through and
  reporting the extra suspicious ones.  -dan ]

Hello Rafał Miłecki,

The patch 6f98e62a9f1b: "b43: update cordic code to match current
specs" from Jan 25, 2010, leads to the following static checker
warning:

	drivers/net/wireless/broadcom/b43/phy_lp.c:1803 lpphy_start_tx_tone()
	warn: mask and shift to zero

drivers/net/wireless/broadcom/b43/phy_lp.c
  1800          for (i = 0; i < samples; i++) {
  1801                  sample = b43_cordic(angle);
  1802                  angle += rotation;
  1803                  buf[i] = CORDIC_CONVERT((sample.i * max) & 0xFF) << 8;
  1804                  buf[i] |= CORDIC_CONVERT((sample.q * max) & 0xFF);

Maybe the intention was:

			buf[i] = (CORDIC_CONVERT(sample.i * max) & 0xFF) << 8;
			buf[i] |= CORDIC_CONVERT((sample.q * max) & 0xFF;

  1805          }
  1806  

regards,
dan carpenter

             reply	other threads:[~2015-11-26 11:59 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-26 11:58 Dan Carpenter [this message]
2015-11-26 12:40 ` (bug report) b43: precendence error Michael Büsch

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