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authorJussi Kivilinna <jussi.kivilinna@mbnet.fi>2011-06-20 14:42:28 +0300
committerJohn W. Linville <linville@tuxdriver.com>2011-06-22 16:09:45 -0400
commit7a1d6564a15183cb5994656040966df09af8390f (patch)
treed9637c519b66007d6b98249c3477051fa4bba870 /drivers/net/wireless/zd1211rw
parent670dc2833d144375eac36ad74111495a825a9288 (diff)
zd1211rw: fix invalid signal values from device
Driver uses IEEE80211_HW_SIGNAL_UNSPEC and so signal values reported to mac80211 should be in range 0..100. Sometimes device return out of range values. These out of range values can then trigger warning in cfg80211_inform_bss_frame. This patch adds checks to enforce range returned from driver to mac80211 be in 0..100 range. Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/zd1211rw')
-rw-r--r--drivers/net/wireless/zd1211rw/zd_def.h6
-rw-r--r--drivers/net/wireless/zd1211rw/zd_mac.c20
2 files changed, 24 insertions, 2 deletions
diff --git a/drivers/net/wireless/zd1211rw/zd_def.h b/drivers/net/wireless/zd1211rw/zd_def.h
index 5463ca9ebc0..9a1b013f81b 100644
--- a/drivers/net/wireless/zd1211rw/zd_def.h
+++ b/drivers/net/wireless/zd1211rw/zd_def.h
@@ -37,9 +37,15 @@ typedef u16 __nocast zd_addr_t;
if (net_ratelimit()) \
dev_printk_f(KERN_DEBUG, dev, fmt, ## args); \
} while (0)
+# define dev_dbg_f_cond(dev, cond, fmt, args...) ({ \
+ bool __cond = !!(cond); \
+ if (unlikely(__cond)) \
+ dev_printk_f(KERN_DEBUG, dev, fmt, ## args); \
+})
#else
# define dev_dbg_f(dev, fmt, args...) do { (void)(dev); } while (0)
# define dev_dbg_f_limit(dev, fmt, args...) do { (void)(dev); } while (0)
+# define dev_dbg_f_cond(dev, cond, fmt, args...) do { (void)(dev); } while (0)
#endif /* DEBUG */
#ifdef DEBUG
diff --git a/drivers/net/wireless/zd1211rw/zd_mac.c b/drivers/net/wireless/zd1211rw/zd_mac.c
index 5037c8b2b41..5de28bf6fa5 100644
--- a/drivers/net/wireless/zd1211rw/zd_mac.c
+++ b/drivers/net/wireless/zd1211rw/zd_mac.c
@@ -160,6 +160,22 @@ static int zd_reg2alpha2(u8 regdomain, char *alpha2)
return 1;
}
+static int zd_check_signal(struct ieee80211_hw *hw, int signal)
+{
+ struct zd_mac *mac = zd_hw_mac(hw);
+
+ dev_dbg_f_cond(zd_mac_dev(mac), signal < 0 || signal > 100,
+ "%s: signal value from device not in range 0..100, "
+ "but %d.\n", __func__, signal);
+
+ if (signal < 0)
+ signal = 0;
+ else if (signal > 100)
+ signal = 100;
+
+ return signal;
+}
+
int zd_mac_preinit_hw(struct ieee80211_hw *hw)
{
int r;
@@ -461,7 +477,7 @@ static void zd_mac_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb,
if (i<IEEE80211_TX_MAX_RATES)
info->status.rates[i].idx = -1; /* terminate */
- info->status.ack_signal = ackssi;
+ info->status.ack_signal = zd_check_signal(hw, ackssi);
ieee80211_tx_status_irqsafe(hw, skb);
}
@@ -982,7 +998,7 @@ int zd_mac_rx(struct ieee80211_hw *hw, const u8 *buffer, unsigned int length)
stats.freq = zd_channels[_zd_chip_get_channel(&mac->chip) - 1].center_freq;
stats.band = IEEE80211_BAND_2GHZ;
- stats.signal = status->signal_strength;
+ stats.signal = zd_check_signal(hw, status->signal_strength);
rate = zd_rx_rate(buffer, status);