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staging: unisys: visorbus: add error handling visorbus_enable_channel_interrupt

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Add error handling to visorbus_enable_channel_interrupt.

Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
David Kershner 2017-03-28 09:34:44 -04:00 committed by Greg Kroah-Hartman
parent b90194d9bb
commit 5dca9b2944
2 changed files with 4 additions and 4 deletions
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2
drivers/staging/unisys/include/visorbus.h
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@ -180,7 +180,7 @@ int visorbus_read_channel(struct visor_device *dev,
int visorbus_write_channel(struct visor_device *dev,
unsigned long offset, void *src,
unsigned long nbytes);
void visorbus_enable_channel_interrupts(struct visor_device *dev);
int visorbus_enable_channel_interrupts(struct visor_device *dev);
void visorbus_disable_channel_interrupts(struct visor_device *dev);
/* Levels of severity for diagnostic events, in order from lowest severity to

6
drivers/staging/unisys/visorbus/visorbus_main.c
View File

@ -580,17 +580,17 @@ EXPORT_SYMBOL_GPL(visorbus_write_channel);
* Currently we don't yet have a real interrupt, so for now we just call the
* interrupt function periodically via a timer.
*/
void
int
visorbus_enable_channel_interrupts(struct visor_device *dev)
{
struct visor_driver *drv = to_visor_driver(dev->device.driver);
if (!drv->channel_interrupt) {
dev_err(&dev->device, "%s no interrupt function!\n", __func__);
return;
return -ENOENT;
}
dev_start_periodic_work(dev);
return dev_start_periodic_work(dev);
}
EXPORT_SYMBOL_GPL(visorbus_enable_channel_interrupts);