pcf50633: use a dedicated workqueue for irq processing

Using the default kernel "events" workqueue causes problems with
synchronous adc readings if initiated from some task on the same
workqueue.

I had a deadlock trying to use pcf50633_adc_sync_read from a
power_supply class driver because the reading was initiated from the
workqueue and it waited for the irq processing to complete (to get the
result) and that was put on the same workqueue.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/mfd/pcf50633/core.h b/include/linux/mfd/pcf50633/core.h
index af67b4e3ec6..aed1fabb068 100644
--- a/include/linux/mfd/pcf50633/core.h
+++ b/include/linux/mfd/pcf50633/core.h
@@ -138,6 +138,7 @@ struct pcf50633 {
 	int irq;
 	struct pcf50633_irq irq_handler[PCF50633_NUM_IRQ];
 	struct work_struct irq_work;
+	struct workqueue_struct *work_queue;
 	struct mutex lock;
 
 	u8 mask_regs[5];