iio: iio_event_getfd -- fix ev_int build failure

Fix build failure in staging iio driver:

.../drivers/staging/iio/industrialio-core.c: In function 'iio_event_getfd':
.../drivers/staging/iio/industrialio-core.c:262:32: error:
			'ev_int' undeclared (first use in this function)

Also convert the rest of the function to use the new variable.

Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/staging/iio/industrialio-core.c b/drivers/staging/iio/industrialio-core.c
index 26564094e33b9512561a86a47b4c2705e4a38d8f..aec9311b108c7c73b2b599c42976cbe99e1ca8b2 100644 (file)
--- a/drivers/staging/iio/industrialio-core.c
+++ b/drivers/staging/iio/industrialio-core.c
@@ -242,25 +242,24 @@ static const struct file_operations iio_event_chrdev_fileops = {
 
 static int iio_event_getfd(struct iio_dev *indio_dev)
 {
+       struct iio_event_interface *ev_int = indio_dev->event_interface;
        int fd;
 
-       if (indio_dev->event_interface == NULL)
+       if (ev_int == NULL)
                return -ENODEV;
 
-       mutex_lock(&indio_dev->event_interface->event_list_lock);
-       if (test_and_set_bit(IIO_BUSY_BIT_POS,
-                            &indio_dev->event_interface->flags)) {
-               mutex_unlock(&indio_dev->event_interface->event_list_lock);
+       mutex_lock(&ev_int->event_list_lock);
+       if (test_and_set_bit(IIO_BUSY_BIT_POS, &ev_int->flags)) {
+               mutex_unlock(&ev_int->event_list_lock);
                return -EBUSY;
        }
-       mutex_unlock(&indio_dev->event_interface->event_list_lock);
+       mutex_unlock(&ev_int->event_list_lock);
        fd = anon_inode_getfd("iio:event",
-                               &iio_event_chrdev_fileops,
-                               indio_dev->event_interface, O_RDONLY);
+                               &iio_event_chrdev_fileops, ev_int, O_RDONLY);
        if (fd < 0) {
-               mutex_lock(&indio_dev->event_interface->event_list_lock);
+               mutex_lock(&ev_int->event_list_lock);
                clear_bit(IIO_BUSY_BIT_POS, &ev_int->flags);
-               mutex_unlock(&indio_dev->event_interface->event_list_lock);
+               mutex_unlock(&ev_int->event_list_lock);
        }
        return fd;
 }