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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2021-10-06 10:35:42 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-11-17 09:48:37 +0100 |
| commit | 1b6365fdae77cd428ddf00925178ab2f7c6b97f3 (patch) | |
| tree | 4289c251c3deae72a14151958e63fd2087c2d949 /drivers/net/wireless | |
| parent | c51ac7fd0256f93b159da5263784dfff1fb4bcda (diff) | |
| download | linux-1b6365fdae77cd428ddf00925178ab2f7c6b97f3.tar.gz linux-1b6365fdae77cd428ddf00925178ab2f7c6b97f3.tar.bz2 linux-1b6365fdae77cd428ddf00925178ab2f7c6b97f3.zip | |
b43legacy: fix a lower bounds test
[ Upstream commit c1c8380b0320ab757e60ed90efc8b1992a943256 ]
The problem is that "channel" is an unsigned int, when it's less 5 the
value of "channel - 5" is not a negative number as one would expect but
is very high positive value instead.
This means that "start" becomes a very high positive value. The result
of that is that we never enter the "for (i = start; i <= end; i++) {"
loop. Instead of storing the result from b43legacy_radio_aci_detect()
it just uses zero.
Fixes: 75388acd0cd8 ("[B43LEGACY]: add mac80211-based driver for legacy BCM43xx devices")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Michael Büsch <m@bues.ch>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20211006073542.GD8404@kili
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/net/wireless')
| -rw-r--r-- | drivers/net/wireless/broadcom/b43legacy/radio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/broadcom/b43legacy/radio.c b/drivers/net/wireless/broadcom/b43legacy/radio.c index da40d1ca8723..e4dce76a4481 100644 --- a/drivers/net/wireless/broadcom/b43legacy/radio.c +++ b/drivers/net/wireless/broadcom/b43legacy/radio.c @@ -283,7 +283,7 @@ u8 b43legacy_radio_aci_scan(struct b43legacy_wldev *dev) & 0x7FFF); b43legacy_set_all_gains(dev, 3, 8, 1); - start = (channel - 5 > 0) ? channel - 5 : 1; + start = (channel > 5) ? channel - 5 : 1; end = (channel + 5 < 14) ? channel + 5 : 13; for (i = start; i <= end; i++) { |