wimax/i2400m: introduce i2400m_reset(), stopping TX and carrier

Currently the i2400m driver was resetting by just calling
i2400m->bus_reset(). However, this was missing stopping the TX queue
and downing the carrier. This was causing, for the corner case of the
driver reseting a device that refuses to go out of idle mode, that a
few packets would be queued and more than one reset would go through,
making the recovery a wee bit messy.

To avoid introducing the same cleanup in all the bus-specific driver,
introduced a i2400m_reset() function that takes care of house cleaning
and then calling the bus-level reset implementation.

The bulk of the changes in all files are just to rename the call from
i2400m->bus_reset() to i2400m_reset().

Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>

1 files changed, 20 insertions, 2 deletions

diff --git a/drivers/net/wimax/i2400m/driver.c b/drivers/net/wimax/i2400m/driver.c
index cc58a864bd06..96a615fe09de 100644
--- a/drivers/net/wimax/i2400m/driver.c
+++ b/drivers/net/wimax/i2400m/driver.c
@@ -255,7 +255,7 @@ int i2400m_op_reset(struct wimax_dev *wimax_dev)
 	mutex_lock(&i2400m->init_mutex);
 	i2400m->reset_ctx = &ctx;
 	mutex_unlock(&i2400m->init_mutex);
-	result = i2400m->bus_reset(i2400m, I2400M_RT_WARM);
+	result = i2400m_reset(i2400m, I2400M_RT_WARM);
 	if (result < 0)
 		goto out;
 	result = wait_for_completion_timeout(&ctx.completion, 4*HZ);
@@ -710,7 +710,7 @@ out_unlock:
 	mutex_unlock(&i2400m->init_mutex);
 	if (result == -EUCLEAN) {
 		/* ops, need to clean up [w/ init_mutex not held] */
-		result = i2400m->bus_reset(i2400m, I2400M_RT_BUS);
+		result = i2400m_reset(i2400m, I2400M_RT_BUS);
 		if (result >= 0)
 			result = -ENODEV;
 	}
@@ -815,6 +815,24 @@ void i2400m_init(struct i2400m *i2400m)
 EXPORT_SYMBOL_GPL(i2400m_init);
 
 
+int i2400m_reset(struct i2400m *i2400m, enum i2400m_reset_type rt)
+{
+	struct net_device *net_dev = i2400m->wimax_dev.net_dev;
+
+	/*
+	 * Make sure we stop TXs and down the carrier before
+	 * resetting; this is needed to avoid things like
+	 * i2400m_wake_tx() scheduling stuff in parallel.
+	 */
+	if (net_dev->reg_state == NETREG_REGISTERED) {
+		netif_tx_disable(net_dev);
+		netif_carrier_off(net_dev);
+	}
+	return i2400m->bus_reset(i2400m, rt);
+}
+EXPORT_SYMBOL_GPL(i2400m_reset);
+
+
 /**
  * i2400m_setup - bus-generic setup function for the i2400m device
  *