The following commit has been merged in the batman-adv/next branch: commit 755051993bfcdf07acd84a7ffd08d463b85bfd69 Author: Nick Kossifidis mickflemm@gmail.com Date: Sun Aug 5 22:35:34 2012 +0300

ath5k: Fix range scaling when setting rate power table

rates[i] is unsigned but txp_offset can be negative for newer parts with PDADC table. We cover the case when rates[i] + txp_offset > 63 but we must also cover the case when its < 0 or else rates[i] will overflow.

Signed-off-by: Nick Kossifidis mickflemm@gmail.com Signed-off-by: John W. Linville linville@tuxdriver.com

diff --git a/drivers/net/wireless/ath/ath5k/phy.c b/drivers/net/wireless/ath/ath5k/phy.c index aa1a77d..84a9aaf 100644 --- a/drivers/net/wireless/ath/ath5k/phy.c +++ b/drivers/net/wireless/ath/ath5k/phy.c @@ -3516,6 +3516,7 @@ ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr, { unsigned int i; u16 *rates; + s16 rate_idx_scaled = 0;

/* max_pwr is power level we got from driver/user in 0.5dB * units, switch to 0.25dB units so we can compare */ @@ -3580,10 +3581,13 @@ ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr, * match the power range set by user with the power indices * on PCDAC/PDADC table */ for (i = 0; i < 16; i++) { - rates[i] += ah->ah_txpower.txp_offset; + rate_idx_scaled = rates[i] + ah->ah_txpower.txp_offset; /* Don't get out of bounds */ - if (rates[i] > 63) - rates[i] = 63; + if (rate_idx_scaled > 63) + rate_idx_scaled = 63; + if (rate_idx_scaled < 0) + rate_idx_scaled = 0; + rates[i] = rate_idx_scaled; } }