staging:iio: Add polling of events on the ring access chrdev.
Staging one of combining the ring chrdevs.
Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/staging/iio/ring_sw.c b/drivers/staging/iio/ring_sw.c
index 0004814..53c6774 100644
--- a/drivers/staging/iio/ring_sw.c
+++ b/drivers/staging/iio/ring_sw.c
@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/device.h>
#include <linux/workqueue.h>
+#include <linux/sched.h>
#include <linux/poll.h>
#include "ring_sw.h"
#include "trigger.h"
@@ -136,6 +137,8 @@
ret = __iio_push_event(&ring->buf.ev_int,
code,
timestamp);
+ ring->buf.stufftoread = true;
+ wake_up_interruptible(&ring->buf.pollq);
}
return ret;
}
@@ -261,6 +264,10 @@
ret = -EFAULT;
goto error_free_data_cpy;
}
+
+ if (bytes_to_rip >= ring->buf.length*ring->buf.bytes_per_datum/2)
+ ring->buf.stufftoread = 0;
+
error_free_data_cpy:
kfree(data);
error_ret:
@@ -310,6 +317,7 @@
int ret = 0;
struct iio_sw_ring_buffer *ring = iio_to_sw_ring(r);
+ r->stufftoread = false;
spin_lock(&ring->use_lock);
if (!ring->update_needed)
goto error_ret;