ath5k: fix memory leak when fewer than N_PD_CURVES are in use

We would free the proper number of curves, but in the wrong
slots, due to a missing level of indirection through
the pdgain_idx table.

It's simpler just to try to free all four slots, so do that.

Cc: stable@kernel.org
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 3 insertions, 5 deletions

diff --git a/drivers/net/wireless/ath/ath5k/eeprom.c b/drivers/net/wireless/ath/ath5k/eeprom.c
index 1fef84f87c78..392771f93759 100644
--- a/drivers/net/wireless/ath/ath5k/eeprom.c
+++ b/drivers/net/wireless/ath/ath5k/eeprom.c
@@ -691,14 +691,12 @@ ath5k_eeprom_free_pcal_info(struct ath5k_hw *ah, int mode)
                 if (!chinfo[pier].pd_curves)
                         continue;
 
-                for (pdg = 0; pdg < ee->ee_pd_gains[mode]; pdg++) {
+                for (pdg = 0; pdg < AR5K_EEPROM_N_PD_CURVES; pdg++) {
                         struct ath5k_pdgain_info *pd =
                                         &chinfo[pier].pd_curves[pdg];
 
-                        if (pd != NULL) {
-                                kfree(pd->pd_step);
-                                kfree(pd->pd_pwr);
-                        }
+                        kfree(pd->pd_step);
+                        kfree(pd->pd_pwr);
                 }
 
                 kfree(chinfo[pier].pd_curves);