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b43: Fix error in cordic routine

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commit 8ea3819c0b upstream.

The cordic routine for calculating sines and cosines that was added in
commit 6f98e62a9f ("b43: update cordic code to match current specs")
contains an error whereby a quantity declared u32 can in fact go negative.

This problem was detected by Priit Laes who is switching b43 to use the
routine in the library functions of the kernel.

Fixes: 9865045403 ("b43: make cordic common (LP-PHY and N-PHY need it)")
Reported-by: Priit Laes <plaes@plaes.org>
Cc: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Larry Finger 2018-11-19 20:01:24 +02:00 • committed by Ben Hutchings
commit dd7ed5143c
1 changed files with 1 additions and 1 deletions
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