b43: Add TX statistics debugging counters

This adds a few debugging counters, that are useful for debugging the
"card does not transmit" or "connection is unstable" kind of problems.
It's also useful for tuning an RC algorithm.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/wireless/b43/dma.h b/drivers/net/wireless/b43/dma.h
index 9336286d97a7..ea27085dec0e 100644
--- a/drivers/net/wireless/b43/dma.h
+++ b/drivers/net/wireless/b43/dma.h
@@ -256,7 +256,13 @@ struct b43_dmaring {
         int max_used_slots;
         /* Last time we injected a ring overflow. */
         unsigned long last_injected_overflow;
-#endif                          /* CONFIG_B43_DEBUG */
+        /* Statistics: Number of successfully transmitted packets */
+        u64 nr_succeed_tx_packets;
+        /* Statistics: Number of failed TX packets */
+        u64 nr_failed_tx_packets;
+        /* Statistics: Total number of TX plus all retries. */
+        u64 nr_total_packet_tries;
+#endif /* CONFIG_B43_DEBUG */
 };
 
 static inline u32 b43_dma_read(struct b43_dmaring *ring, u16 offset)