1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/net/wimax/i2400m/i2400m.h b/drivers/net/wimax/i2400m/i2400m.h
index da218b98e27f..ad8e6a3be1e3 100644
--- a/drivers/net/wimax/i2400m/i2400m.h
+++ b/drivers/net/wimax/i2400m/i2400m.h
@@ -177,6 +177,11 @@ enum {
         I2400M_BM_ACK_BUF_SIZE = 256,
 };
 
+enum {
+        /* Maximum number of bus reset can be retried */
+        I2400M_BUS_RESET_RETRIES = 3,
+};
+
 /**
  * struct i2400m_poke_table - Hardware poke table for the Intel 2400m
  *
@@ -517,6 +522,29 @@ struct i2400m_barker_db;
  *     same.
  *
  * @pm_notifier: used to register for PM events
+ *
+ * @bus_reset_retries: counter for the number of bus resets attempted for
+ *      this boot. It's not for tracking the number of bus resets during
+ *      the whole driver life cycle (from insmod to rmmod) but for the
+ *      number of dev_start() executed until dev_start() returns a success
+ *      (ie: a good boot means a dev_stop() followed by a successful
+ *      dev_start()). dev_reset_handler() increments this counter whenever
+ *      it is triggering a bus reset. It checks this counter to decide if a
+ *      subsequent bus reset should be retried. dev_reset_handler() retries
+ *      the bus reset until dev_start() succeeds or the counter reaches
+ *      I2400M_BUS_RESET_RETRIES. The counter is cleared to 0 in
+ *      dev_reset_handle() when dev_start() returns a success,
+ *      ie: a successul boot is completed.
+ *
+ * @alive: flag to denote if the device *should* be alive. This flag is
+ *      everything like @updown (see doc for @updown) except reflecting
+ *      the device state *we expect* rather than the actual state as denoted
+ *      by @updown. It is set 1 whenever @updown is set 1 in dev_start().
+ *      Then the device is expected to be alive all the time
+ *      (i2400m->alive remains 1) until the driver is removed. Therefore
+ *      all the device reboot events detected can be still handled properly
+ *      by either dev_reset_handle() or .pre_reset/.post_reset as long as
+ *      the driver presents. It is set 0 along with @updown in dev_stop().
  */
 struct i2400m {
         struct wimax_dev wimax_dev;     /* FIRST! See doc */
@@ -591,6 +619,12 @@ struct i2400m {
         struct i2400m_barker_db *barker;
 
         struct notifier_block pm_notifier;
+
+        /* counting bus reset retries in this boot */
+        atomic_t bus_reset_retries;
+
+        /* if the device is expected to be alive */
+        unsigned alive;
 };