package/kernel/mac80211/patches/rt2x00/704-rt2x00-use-different-txstatus-timeouts-when-flushing.patch

   1 From feb87977b6d251fb01a329905719e45908f6c939 Mon Sep 17 00:00:00 2001
   2 From: Stanislaw Gruszka <sgruszka@redhat.com>
   3 Date: Fri, 10 Aug 2018 12:31:55 +0200
   4 Subject: [PATCH 4/5] rt2x00: use different txstatus timeouts when flushing
   5
   6 Use different tx status timeouts for normal operation and when flushing.
   7 This increase timeout to 2s for normal operation as when there are bad
   8 radio conditions and frames are reposted many times device can not provide
   9 the status for quite long. With new timeout we can still get valid status
  10 on such bad conditions.
  11
  12 Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
  13 ---
  14  .../net/wireless/ralink/rt2x00/rt2800lib.c    | 31 +++++++++++++------
  15  drivers/net/wireless/ralink/rt2x00/rt2x00.h   |  1 +
  16  .../net/wireless/ralink/rt2x00/rt2x00mac.c    |  4 +++
  17  3 files changed, 26 insertions(+), 10 deletions(-)
  18
  19 --- a/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  20 +++ b/drivers/net/wireless/ralink/rt2x00/rt2800lib.c
  21 @@ -1140,36 +1140,47 @@ void rt2800_txdone(struct rt2x00_dev *rt
  22  }
  23  EXPORT_SYMBOL_GPL(rt2800_txdone);
  24
  25 -static inline bool rt2800_entry_txstatus_timeout(struct queue_entry *entry)
  26 +static inline bool rt2800_entry_txstatus_timeout(struct rt2x00_dev *rt2x00dev,
  27 +                                                struct queue_entry *entry)
  28  {
  29 -       bool tout;
  30 +       bool ret;
  31 +       unsigned long tout;
  32
  33         if (!test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
  34                 return false;
  35
  36 -       tout = time_after(jiffies, entry->last_action + msecs_to_jiffies(500));
  37 -       if (unlikely(tout))
  38 +       if (test_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags))
  39 +               tout = msecs_to_jiffies(100);
  40 +       else
  41 +               tout = msecs_to_jiffies(2000);
  42 +
  43 +       ret = time_after(jiffies, entry->last_action + tout);
  44 +       if (unlikely(ret))
  45                 rt2x00_dbg(entry->queue->rt2x00dev,
  46                            "TX status timeout for entry %d in queue %d\n",
  47                            entry->entry_idx, entry->queue->qid);
  48 -       return tout;
  49 -
  50 +       return ret;
  51  }
  52
  53  bool rt2800_txstatus_timeout(struct rt2x00_dev *rt2x00dev)
  54  {
  55         struct data_queue *queue;
  56         struct queue_entry *entry;
  57 +       unsigned long tout;
  58 +
  59 +       if (test_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags))
  60 +               tout = msecs_to_jiffies(50);
  61 +       else
  62 +               tout = msecs_to_jiffies(1000);
  63
  64 -       if (time_before(jiffies,
  65 -                       rt2x00dev->last_nostatus_check + msecs_to_jiffies(500)))
  66 +       if (time_before(jiffies, rt2x00dev->last_nostatus_check + tout))
  67                 return false;
  68
  69         rt2x00dev->last_nostatus_check = jiffies;
  70
  71         tx_queue_for_each(rt2x00dev, queue) {
  72                 entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
  73 -               if (rt2800_entry_txstatus_timeout(entry))
  74 +               if (rt2800_entry_txstatus_timeout(rt2x00dev, entry))
  75                         return true;
  76         }
  77
  78 @@ -1198,7 +1209,7 @@ void rt2800_txdone_nostatus(struct rt2x0
  79                                 break;
  80
  81                         if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags) ||
  82 -                           rt2800_entry_txstatus_timeout(entry))
  83 +                           rt2800_entry_txstatus_timeout(rt2x00dev, entry))
  84                                 rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
  85                         else
  86                                 break;
  87 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00.h
  88 +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00.h
  89 @@ -667,6 +667,7 @@ enum rt2x00_state_flags {
  90         DEVICE_STATE_STARTED,
  91         DEVICE_STATE_ENABLED_RADIO,
  92         DEVICE_STATE_SCANNING,
  93 +       DEVICE_STATE_FLUSHING,
  94
  95         /*
  96          * Driver configuration
  97 --- a/drivers/net/wireless/ralink/rt2x00/rt2x00mac.c
  98 +++ b/drivers/net/wireless/ralink/rt2x00/rt2x00mac.c
  99 @@ -720,8 +720,12 @@ void rt2x00mac_flush(struct ieee80211_hw
 100         if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
 101                 return;
 102
 103 +       set_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags);
 104 +
 105         tx_queue_for_each(rt2x00dev, queue)
 106                 rt2x00queue_flush_queue(queue, drop);
 107 +
 108 +       clear_bit(DEVICE_STATE_FLUSHING, &rt2x00dev->flags);
 109  }
 110  EXPORT_SYMBOL_GPL(rt2x00mac_flush);
 111