Fix usb2_poll not to return an error number as the function return value is a

bitmask of events.

Pointed out by:	HPS

1 files changed, 5 insertions, 9 deletions

diff --git a/sys/dev/usb/usb_dev.c b/sys/dev/usb/usb_dev.c
index d206340..512b1f8 100644
--- a/sys/dev/usb/usb_dev.c
+++ b/sys/dev/usb/usb_dev.c
@@ -1072,16 +1072,12 @@ usb2_poll(struct cdev* dev, int events, struct thread* td)
 	struct usb2_cdev_privdata* cpd;
 	struct usb2_fifo *f;
 	struct usb2_mbuf *m;
-	int fflags;
-	int err, revents;
-
-	err = devfs_get_cdevpriv((void **)&cpd);
-	if (err != 0)
-		return (err);
+	int fflags, revents;
 
-	err = usb2_ref_device(cpd, 0 /* no uref */ );
-	if (err)
-		return (POLLHUP);
+	if (devfs_get_cdevpriv((void **)&cpd) != 0 ||
+	    usb2_ref_device(cpd, 0) != 0)
+		return (events &
+		    (POLLHUP|POLLIN|POLLRDNORM|POLLOUT|POLLWRNORM));
 
 	fflags = cpd->fflags;