Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=61af43c56bef2cfcb8f1d9aab4e766e0f7bdd893
Commit: 61af43c56bef2cfcb8f1d9aab4e766e0f7bdd893
Parent: d28c2561fb09dcc0b47ae0ba12083cf0d988495f
Author: Mattias Nissler <[EMAIL PROTECTED]>
AuthorDate: Tue Nov 27 21:50:26 2007 +0100
Committer: David S. Miller <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 15:05:09 2008 -0800
rt2x00: Only update rssi average approximation on receiving beacon frames.
Restrict rssi average updating to beacon frames of the bssid the
interface is
associated with. Without this restriction, strong signals belonging to other
BSS, e.g. beacon frames coming from a nearby AP, would cause incorrectly
high
rssi approximation values. This would then cause the link tuner to reduce
sensitivity, resulting in transmissions from the BSS associated to to be
missed.
Signed-off-by: Mattias Nissler <[EMAIL PROTECTED]>
Signed-off-by: Ivo van Doorn <[EMAIL PROTECTED]>
Signed-off-by: John W. Linville <[EMAIL PROTECTED]>
---
drivers/net/wireless/rt2x00/rt2x00.h | 7 +++++++
drivers/net/wireless/rt2x00/rt2x00dev.c | 19 ++++++++++++++++++-
2 files changed, 25 insertions(+), 1 deletions(-)
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h
b/drivers/net/wireless/rt2x00/rt2x00.h
index 103a122..218068b 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -32,6 +32,7 @@
#include <linux/workqueue.h>
#include <linux/firmware.h>
#include <linux/mutex.h>
+#include <linux/etherdevice.h>
#include <net/mac80211.h>
@@ -149,6 +150,12 @@ static inline int is_probe_resp(u16 fc)
((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP));
}
+static inline int is_beacon(u16 fc)
+{
+ return (((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) &&
+ ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_BEACON));
+}
+
/*
* Chipset identification
* The chipset on the device is composed of a RT and RF chip.
diff --git a/drivers/net/wireless/rt2x00/rt2x00dev.c
b/drivers/net/wireless/rt2x00/rt2x00dev.c
index bd7b738..a771a09 100644
--- a/drivers/net/wireless/rt2x00/rt2x00dev.c
+++ b/drivers/net/wireless/rt2x00/rt2x00dev.c
@@ -526,11 +526,14 @@ void rt2x00lib_rxdone(struct data_entry *entry, struct
sk_buff *skb,
struct rxdata_entry_desc *desc)
{
struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
+ struct interface *intf = &rt2x00dev->interface;
struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
struct ieee80211_hw_mode *mode;
struct ieee80211_rate *rate;
+ struct ieee80211_hdr *hdr;
unsigned int i;
int val = 0;
+ u16 fc;
/*
* Update RX statistics.
@@ -555,7 +558,21 @@ void rt2x00lib_rxdone(struct data_entry *entry, struct
sk_buff *skb,
}
}
- rt2x00lib_update_link_stats(&rt2x00dev->link, desc->rssi);
+ /*
+ * Only update link status if this is a beacon frame carrying our
+ * bssid.
+ */
+ hdr = (struct ieee80211_hdr *) skb->data;
+ if (skb->len >= sizeof(struct ieee80211_hdr *)) {
+ fc = le16_to_cpu(hdr->frame_control);
+ if ((intf->type == IEEE80211_IF_TYPE_STA
+ || intf->type == IEEE80211_IF_TYPE_IBSS)
+ && is_beacon(fc)
+ && compare_ether_addr(hdr->addr3, intf->bssid) == 0)
+ rt2x00lib_update_link_stats(&rt2x00dev->link,
+ desc->rssi);
+ }
+
rt2x00dev->link.qual.rx_success++;
rx_status->rate = val;
-
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