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dahdi_dynamic: Use a tasklet for flushing dynamic drivers.

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Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This commit is contained in:
Shaun Ruffell
2012-04-18 10:58:36 -05:00
committed by Russ Meyerriecks
parent d889fb39d3
commit f44b252472
1 changed files with 34 additions and 0 deletions
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34
drivers/dahdi/dahdi_dynamic.c
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@@ -88,6 +88,8 @@ static int txerrors;
static struct tasklet_struct dahdi_dynamic_tlet;
static void dahdi_dynamic_tasklet(unsigned long data);
#else
static struct tasklet_struct dahdi_dynamic_flush_tlet;
#endif
static DEFINE_MUTEX(dspan_mutex);
@@ -208,12 +210,25 @@ static void __dahdi_dynamic_run(void)
dahdi_dynamic_sendmessage(d);
}
#ifdef ENABLE_TASKLETS
/* If tasklets are not enabled, the above section will be called in
* interrupt context and the flushing of each driver will be called in a
* separate tasklet that only handles that. This is necessary since some
* of the dynamic spans need to call functions that require interrupts
* to be enabled but dahdi_transmit / ...sendmessage needs to be called
* each time the masterspan is processed which happens with interrupts
* disabled.
*
*/
tasklet_hi_schedule(&dahdi_dynamic_flush_tlet);
#else
list_for_each_entry_rcu(drv, &driver_list, list) {
/* Flush any traffic still pending in the driver */
if (drv->flush) {
drv->flush();
}
}
#endif
rcu_read_unlock();
}
@@ -708,6 +723,20 @@ static void dahdi_dynamic_tasklet(unsigned long data)
}
taskletpending = 0;
}
#else
static void dahdi_dynamic_flush_tasklet(unsigned long data)
{
struct dahdi_dynamic_driver *drv;
rcu_read_lock();
list_for_each_entry_rcu(drv, &driver_list, list) {
/* Flush any traffic still pending in the driver */
if (drv->flush) {
drv->flush();
}
}
rcu_read_unlock();
}
#endif
static int dahdi_dynamic_ioctl(unsigned int cmd, unsigned long data)
@@ -840,6 +869,8 @@ static int dahdi_dynamic_init(void)
mod_timer(&alarmcheck, jiffies + 1 * HZ);
#ifdef ENABLE_TASKLETS
tasklet_init(&dahdi_dynamic_tlet, dahdi_dynamic_tasklet, 0);
#else
tasklet_init(&dahdi_dynamic_flush_tlet, dahdi_dynamic_flush_tasklet, 0);
#endif
dahdi_set_dynamic_ops(&dahdi_dynamic_ops);
@@ -856,6 +887,9 @@ static void dahdi_dynamic_cleanup(void)
tasklet_disable(&dahdi_dynamic_tlet);
tasklet_kill(&dahdi_dynamic_tlet);
}
#else
tasklet_disable(&dahdi_dynamic_flush_tlet);
tasklet_kill(&dahdi_dynamic_flush_tlet);
#endif
del_timer_sync(&alarmcheck);
/* Must call again in case it was running before and rescheduled