diff options
| author | Bob Copeland <me@bobcopeland.com> | 2009-03-02 21:55:18 -0500 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-03-27 20:13:18 -0400 |
| commit | b726604706ad88d8b28bc487e45e710f58cc19ee (patch) | |
| tree | 032e6776b16bef549d9c40857f761726c18b8a4a | |
| parent | a3c0b87c4f21911fb7185902dd13f0e3cd7f33f7 (diff) | |
| download | linux-b726604706ad88d8b28bc487e45e710f58cc19ee.tar.gz linux-b726604706ad88d8b28bc487e45e710f58cc19ee.tar.bz2 linux-b726604706ad88d8b28bc487e45e710f58cc19ee.zip | |
ath5k: warn and correct rate for unknown hw rate indexes
ath5k sets up a mapping table from the hardware rate index to
the rate index used by mac80211; however, we have seen some
received frames with incorrect rate indexes. Such frames
normally get dropped with a warning in __ieee80211_rx(),
but it doesn't include enough information to track down the
error.
This patch adds a warning to hw_to_driver_rix for any lookups
that result in a rate index of -1, then returns a valid rate so
the frame can be processed.
Changes-licensed-under: 3-Clause-BSD
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Cc: stable@kernel.org
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/ath5k/base.c | 15 | ||||
| -rw-r--r-- | drivers/net/wireless/ath5k/base.h | 2 |
2 files changed, 13 insertions, 4 deletions
diff --git a/drivers/net/wireless/ath5k/base.c b/drivers/net/wireless/ath5k/base.c index f28b86c5d346..6580df2f7443 100644 --- a/drivers/net/wireless/ath5k/base.c +++ b/drivers/net/wireless/ath5k/base.c @@ -1088,9 +1088,18 @@ ath5k_mode_setup(struct ath5k_softc *sc) static inline int ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix) { - WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES, - "hw_rix out of bounds: %x\n", hw_rix); - return sc->rate_idx[sc->curband->band][hw_rix]; + int rix; + + /* return base rate on errors */ + if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES, + "hw_rix out of bounds: %x\n", hw_rix)) + return 0; + + rix = sc->rate_idx[sc->curband->band][hw_rix]; + if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix)) + rix = 0; + + return rix; } /***************\ diff --git a/drivers/net/wireless/ath5k/base.h b/drivers/net/wireless/ath5k/base.h index 20e0d14b41ec..822956114cd7 100644 --- a/drivers/net/wireless/ath5k/base.h +++ b/drivers/net/wireless/ath5k/base.h @@ -112,7 +112,7 @@ struct ath5k_softc { struct ieee80211_supported_band sbands[IEEE80211_NUM_BANDS]; struct ieee80211_channel channels[ATH_CHAN_MAX]; struct ieee80211_rate rates[IEEE80211_NUM_BANDS][AR5K_MAX_RATES]; - u8 rate_idx[IEEE80211_NUM_BANDS][AR5K_MAX_RATES]; + s8 rate_idx[IEEE80211_NUM_BANDS][AR5K_MAX_RATES]; enum nl80211_iftype opmode; struct ath5k_hw *ah; /* Atheros HW */ |