Re: problem on ACS

On Fri, Jul 29, 2011 at 12:39 AM, MingAnn Ng [off-list ref] wrote:

Survey 2 from wlan0:
 noise:    -84 dBm
 channel active time:  12 ms
 channel busy time:  0 ms
 channel receive time:  0 ms
 channel transmit time:  0 ms
 interference factor:  9223372036854775815.000000

This is caused by log2(0), this if fixed as follows:

diff --git a/src/ap/acs.c b/src/ap/acs.c
index aa5498e..04b1e31 100644
--- a/src/ap/acs.c
+++ b/src/ap/acs.c

@@ -125,7 +125,7 @@ static u64 min(u64 a, u64 b)
  */
 static u64 log2_sane(u64 val)
 {
-	return log2(min(1073741824, val));
+	return return (!val) ? 0 : log2(min(1073741824, val));
 }

I'll send a new version of the last patch with this fix, thanks for
reporting this.

  Luis