tree beef68ff428b4414073142b34910010411b6aaac
parent 61405e97788b1bc4e7c5be5b4ec04a73fc11bac2
author Bob Copeland <me@bobcopeland.com> 1242790651 -0400
committer John W. Linville <linville@tuxdriver.com> 1242845192 -0400

ath5k: avoid and warn on potential infinite loop

If we are trying to interpolate a curve with slope == 0, the return
value will always be the y-coordinate.  In this code we are looping
until we reach a minimum y-coordinate on a line, which in the 0-slope
case can never happen, thus the loop never terminates.

The PCDAC steps come from the EEPROM and should never be equal, but
we should gracefully handle that case, so warn and bail out.

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>