It can, if invalid argument given, return a negative value. In that
case we would access arrays out-of-bounds and such. Check the value
and yell loudly if that happened as it would be a bug in the
implementation. (Instead of silently corrupting memory.)
Signed-off-by: Jiri Slaby <jsl...@suse.cz>
Cc: Nick Kossifidis <mickfl...@gmail.com>
Cc: "Luis R. Rodriguez" <mcg...@qca.qualcomm.com>
---
drivers/net/wireless/ath/ath5k/phy.c | 4 ++++
drivers/net/wireless/ath/ath5k/reset.c | 2 ++
2 files changed, 6 insertions(+)
diff --git a/drivers/net/wireless/ath/ath5k/phy.c
b/drivers/net/wireless/ath/ath5k/phy.c
index ab363f3..a78afa9 100644
--- a/drivers/net/wireless/ath/ath5k/phy.c
+++ b/drivers/net/wireless/ath/ath5k/phy.c
@@ -1613,6 +1613,10 @@ ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
ah->ah_cal_mask |= AR5K_CALIBRATION_NF;
ee_mode = ath5k_eeprom_mode_from_channel(ah->ah_current_channel);
+ if (WARN_ON(ee_mode < 0)) {
+ ah->ah_cal_mask &= ~AR5K_CALIBRATION_NF;
+ return;
+ }
/* completed NF calibration, test threshold */
nf = ath5k_hw_read_measured_noise_floor(ah);
diff --git a/drivers/net/wireless/ath/ath5k/reset.c
b/drivers/net/wireless/ath/ath5k/reset.c
index 4084b10..e2d8b2c 100644
--- a/drivers/net/wireless/ath/ath5k/reset.c
+++ b/drivers/net/wireless/ath/ath5k/reset.c
@@ -985,6 +985,8 @@ ath5k_hw_commit_eeprom_settings(struct ath5k_hw *ah,
return;
ee_mode = ath5k_eeprom_mode_from_channel(channel);
+ if (WARN_ON(ee_mode < 0))
+ return;
/* Adjust power delta for channel 14 */
if (channel->center_freq == 2484)
--
1.8.1.1
--
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