rt2x00: Allow rt61 to catch up after a missing tx report

Sometimes it happens in the tx path that an entry given to the hardware isn't
reported in the txdone handler. This ultimately led to the dreaded "non-free
entry in the non-full queue" message and the stopping of the tx queue. Work
around this issue by allowing the driver to also clear out previos entries in
the txdone handler.

Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index 01dbef19d651..ecae968ce091 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -1738,6 +1738,7 @@ static void rt61pci_txdone(struct rt2x00_dev *rt2x00dev)
 {
         struct data_ring *ring;
         struct data_entry *entry;
+        struct data_entry *entry_done;
         struct data_desc *txd;
         u32 word;
         u32 reg;
@@ -1791,6 +1792,17 @@ static void rt61pci_txdone(struct rt2x00_dev *rt2x00dev)
                     !rt2x00_get_field32(word, TXD_W0_VALID))
                         return;
 
+                entry_done = rt2x00_get_data_entry_done(ring);
+                while (entry != entry_done) {
+                        /* Catch up. Just report any entries we missed as
+                         * failed. */
+                        WARNING(rt2x00dev,
+                                "TX status report missed for entry %p\n",
+                                entry_done);
+                        rt2x00lib_txdone(entry_done, TX_FAIL_OTHER, 0);
+                        entry_done = rt2x00_get_data_entry_done(ring);
+                }
+
                 /*
                  * Obtain the status about this packet.
                  */