[PATCH 1/1] usb: misc: usbtest: usbtest_do_ioctl may return positive integer

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For case 14 and case 21, their correct return value is the number
of bytes transferred, so it is a positive integer. But in usbtest_ioctl,
it takes non-zero as false return value for usbtest_do_ioctl, so
it will treat the correct test as wrong test, then the time on
tests will be the minus value.

Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Fixes: 18fc4ebdc705 ("usb: misc: usbtest: Remove timeval usage")
---
 drivers/usb/misc/usbtest.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 6b978f0..5e3464e 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -2602,7 +2602,7 @@ usbtest_ioctl(struct usb_interface *intf, unsigned int code, void *buf)
 	ktime_get_ts64(&start);
 
 	retval = usbtest_do_ioctl(intf, param_32);
-	if (retval)
+	if (retval < 0)
 		goto free_mutex;
 
 	ktime_get_ts64(&end);
-- 
1.9.1

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