HID: hidraw: fix signaling SIGIO when hidraw reports an event

This patch fixes sending SIGIO from hidraw_report_event by creating a fasync
handler which adds the fasync entry.

Signed-off-by: Andrew Duggan <aduggan@synaptics.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index 1d8c0219117e..413a73187d33 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -295,6 +295,13 @@ out:
 
 }
 
+static int hidraw_fasync(int fd, struct file *file, int on)
+{
+        struct hidraw_list *list = file->private_data;
+
+        return fasync_helper(fd, file, on, &list->fasync);
+}
+
 static int hidraw_release(struct inode * inode, struct file * file)
 {
         unsigned int minor = iminor(inode);
@@ -438,6 +445,7 @@ static const struct file_operations hidraw_ops = {
         .open =         hidraw_open,
         .release =      hidraw_release,
         .unlocked_ioctl = hidraw_ioctl,
+        .fasync =       hidraw_fasync,
 #ifdef CONFIG_COMPAT
         .compat_ioctl   = hidraw_ioctl,
 #endif