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);

The CORDIC_CONVERT() macro is a bit complicated but I made a small test
program to see how it worked and I believe it just sets buf[i] to zero.

  1805          }
  1806  
  1807          b43_lptab_write_bulk(dev, B43_LPTAB16(5, 0), samples, buf);

regards,
dan carpenter
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