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[PATCH] cfg80211: fix BSS comparison

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Since the BSS table is organized in a RB tree, the BSSs need to be
comparable. This means that we must define a < and > operator to
the BSS object.
compare_ethr_addr isn't enough since it returns only a binary value.

Since Felix's

cfg80211: use compare_ether_addr on MAC addresses instead of memcmp

    Because of the constant size and guaranteed 16 bit alignment, the inline
    compare_ether_addr function is much cheaper than calling memcmp.

    Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>
    Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>

The BSS table is corrupted: rb_find_bss can't find the bss.
As a result BSSes are duplicated in the BSS table, and we get stuck
while probing an AP before associating (in STA mode).

CC: Felix Fietkau <nbd@xxxxxxxxxxx>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
---
Since this patch fixes a very annoying issue I send it upstream directly
---
 net/wireless/scan.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index bd6a0ee..8c8b550 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -378,7 +378,7 @@ static int cmp_bss_core(struct cfg80211_bss *a,
 			       b->len_information_elements);
 	}
 
-	return compare_ether_addr(a->bssid, b->bssid);
+	return memcmp(a->bssid, b->bssid, sizeof(a->bssid));
 }
 
 static int cmp_bss(struct cfg80211_bss *a,
-- 
1.7.1

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Intel Israel (74) Limited

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