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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2018-08-31 11:10:55 +0300 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2018-09-03 10:34:12 +0200 |
| commit | 8442938c3a2177ba16043b3a935f2c78266ad399 (patch) | |
| tree | 1b188162a38fd239ce6abe8ed57167452735965d /net/wireless | |
| parent | 66eb02d839e8495ae6b612e2d09ff599374b80e2 (diff) | |
| download | linux-rpi3-8442938c3a2177ba16043b3a935f2c78266ad399.tar.gz linux-rpi3-8442938c3a2177ba16043b3a935f2c78266ad399.tar.bz2 linux-rpi3-8442938c3a2177ba16043b3a935f2c78266ad399.zip | |
cfg80211: fix a type issue in ieee80211_chandef_to_operating_class()
The "chandef->center_freq1" variable is a u32 but "freq" is a u16 so we
are truncating away the high bits. I noticed this bug because in commit
9cf0a0b4b64a ("cfg80211: Add support for 60GHz band channels 5 and 6")
we made "freq <= 56160 + 2160 * 6" a valid requency when before it was
only "freq <= 56160 + 2160 * 4" that was valid. It introduces a static
checker warning:
net/wireless/util.c:1571 ieee80211_chandef_to_operating_class()
warn: always true condition '(freq <= 56160 + 2160 * 6) => (0-u16max <= 69120)'
But really we probably shouldn't have been truncating the high bits
away to begin with.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/util.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/wireless/util.c b/net/wireless/util.c index 3c654cd7ba56..908bf5b6d89e 100644 --- a/net/wireless/util.c +++ b/net/wireless/util.c @@ -1374,7 +1374,7 @@ bool ieee80211_chandef_to_operating_class(struct cfg80211_chan_def *chandef, u8 *op_class) { u8 vht_opclass; - u16 freq = chandef->center_freq1; + u32 freq = chandef->center_freq1; if (freq >= 2412 && freq <= 2472) { if (chandef->width > NL80211_CHAN_WIDTH_40) |