USB: usbmon: remove assignment from IS_ERR argument

---
 drivers/usb/mon/mon_text.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
 
diff --git a/drivers/usb/mon/mon_text.c b/drivers/usb/mon/mon_text.c
index 98e4f63..e59334b 100644
--- a/drivers/usb/mon/mon_text.c
+++ b/drivers/usb/mon/mon_text.c
@@ -387,7 +387,8 @@ static ssize_t mon_text_read_t(struct file *file, char __user *buf,
 	struct mon_event_text *ep;
 	struct mon_text_ptr ptr;
 
-	if (IS_ERR(ep = mon_text_read_wait(rp, file)))
+	ep = mon_text_read_wait(rp, file);
+	if (IS_ERR(ep))
 		return PTR_ERR(ep);
 	mutex_lock(&rp->printf_lock);
 	ptr.cnt = 0;
@@ -414,7 +415,8 @@ static ssize_t mon_text_read_u(struct file *file, char __user *buf,
 	struct mon_event_text *ep;
 	struct mon_text_ptr ptr;
 
-	if (IS_ERR(ep = mon_text_read_wait(rp, file)))
+	ep = mon_text_read_wait(rp, file);
+	if (IS_ERR(ep))
 		return PTR_ERR(ep);
 	mutex_lock(&rp->printf_lock);
 	ptr.cnt = 0;