From: David Kershner <david.kersh...@unisys.com>
Instead of rescheduling the work queue after we have called the
channel interrupt, start it when the driver has finished processing
the queue.
This patch introduces the visorbus_rearm_channel_interrupts function
that must get called when the driver decides that it is done processing
its queue.
Visorinput, visorhba, and visornic were all updated to call the new
function.
Signed-off-by: David Kershner <david.kersh...@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.ro...@unisys.com>
---
drivers/staging/unisys/include/visorbus.h | 2 ++
drivers/staging/unisys/visorbus/visorbus_main.c | 9 +++++++--
drivers/staging/unisys/visorhba/visorhba_main.c | 6 +++++-
drivers/staging/unisys/visorinput/visorinput.c | 5 ++++-
drivers/staging/unisys/visornic/visornic_main.c | 6 +++++-
5 files changed, 23 insertions(+), 5 deletions(-)
diff --git a/drivers/staging/unisys/include/visorbus.h
b/drivers/staging/unisys/include/visorbus.h
index 644ca30..5f44289 100644
--- a/drivers/staging/unisys/include/visorbus.h
+++ b/drivers/staging/unisys/include/visorbus.h
@@ -178,6 +178,8 @@ int visorbus_registerdevnode(struct visor_device *dev,
const char *name, int major, int minor);
void visorbus_enable_channel_interrupts(struct visor_device *dev);
void visorbus_disable_channel_interrupts(struct visor_device *dev);
+void visorbus_rearm_channel_interrupts(struct visor_device *dev);
+
#endif
/* Note that for visorchannel_create()
diff --git a/drivers/staging/unisys/visorbus/visorbus_main.c
b/drivers/staging/unisys/visorbus/visorbus_main.c
index 4304ca0..afbb9bc 100644
--- a/drivers/staging/unisys/visorbus/visorbus_main.c
+++ b/drivers/staging/unisys/visorbus/visorbus_main.c
@@ -715,6 +715,13 @@ unregister_driver_attributes(struct visor_driver *drv)
driver_remove_file(&drv->driver, &drv->version_attr);
}
+visorbus_rearm_channel_interrupts(struct visor_device *dev)
+{
+ if (!visor_periodic_work_nextperiod(dev->periodic_work))
+ put_device(&dev->device);
+}
+EXPORT_SYMBOL_GPL(visorbus_rearm_channel_interrupts);
+
static void
dev_periodic_work(void *xdev)
{
@@ -725,8 +732,6 @@ dev_periodic_work(void *xdev)
if (drv->channel_interrupt)
drv->channel_interrupt(dev);
up(&dev->visordriver_callback_lock);
- if (!visor_periodic_work_nextperiod(dev->periodic_work))
- put_device(&dev->device);
}
static void
diff --git a/drivers/staging/unisys/visorhba/visorhba_main.c
b/drivers/staging/unisys/visorhba/visorhba_main.c
index 70bc878..0f6bb26 100644
--- a/drivers/staging/unisys/visorhba/visorhba_main.c
+++ b/drivers/staging/unisys/visorhba/visorhba_main.c
@@ -1008,12 +1008,16 @@ static void process_incoming_rsps(unsigned long v)
const int size = sizeof(*cmdrsp);
cmdrsp = kmalloc(size, GFP_ATOMIC);
- if (!cmdrsp)
+ if (!cmdrsp) {
+ visorbus_rearm_channel_interrupts(devdata->dev);
return;
+ }
/* drain queue */
drain_queue(cmdrsp, devdata);
+ visorbus_rearm_channel_interrupts(devdata->dev);
+
kfree(cmdrsp);
return;
}
diff --git a/drivers/staging/unisys/visorinput/visorinput.c
b/drivers/staging/unisys/visorinput/visorinput.c
index 1c2a210..84d0511 100644
--- a/drivers/staging/unisys/visorinput/visorinput.c
+++ b/drivers/staging/unisys/visorinput/visorinput.c
@@ -673,7 +673,7 @@ visorinput_channel_interrupt(struct visor_device *dev)
devdata_get(dev_get_drvdata(&dev->device));
if (!devdata)
- return;
+ goto rearm_interrupts;
spin_lock(&devdata->lock_isr);
if (devdata->paused) /* don't touch device/channel when paused */
@@ -782,6 +782,9 @@ visorinput_channel_interrupt(struct visor_device *dev)
out_locked:
devdata_put(devdata);
spin_unlock(&devdata->lock_isr);
+
+rearm_interrupts:
+ visorbus_rearm_channel_interrupts(dev);
}
static int
diff --git a/drivers/staging/unisys/visornic/visornic_main.c
b/drivers/staging/unisys/visornic/visornic_main.c
index 9566b91..e8ad219 100644
--- a/drivers/staging/unisys/visornic/visornic_main.c
+++ b/drivers/staging/unisys/visornic/visornic_main.c
@@ -1712,8 +1712,10 @@ static int visornic_poll(struct napi_struct *napi, int
budget)
* If there aren't any more packets to receive
* stop the poll
*/
- if (rx_count < budget)
+ if (rx_count < budget) {
napi_complete(napi);
+ visorbus_rearm_channel_interrupts(devdata->dev);
+ }
return rx_count;
}
@@ -1734,6 +1736,8 @@ visornic_irq(struct visor_device *v)
if (!visorchannel_signalempty(devdata->dev->visorchannel,
IOCHAN_FROM_IOPART))
napi_schedule(&devdata->napi);
+ else
+ visorbus_rearm_channel_interrupts(v);
}
/**
--
2.5.0
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