(bug report) b43: precendence error
Dan Carpenter
dan.carpenter at oracle.com
Thu Nov 26 03:58:43 PST 2015
[ 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
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