[PATCH 5.14 005/162] usb: gadget: r8a66597: fix a loop in set_feature()

[Greg Kroah-Hartman]

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit 17956b53ebff6a490baf580a836cbd3eae94892b upstream.

This loop is supposed to loop until if reads something other than
CS_IDST or until it times out after 30,000 attempts.  But because of
the || vs && bug, it will never time out and instead it will loop a
minimum of 30,000 times.

This bug is quite old but the code is only used in USB_DEVICE_TEST_MODE
so it probably doesn't affect regular usage.

Fixes: 96fe53ef5498 ("usb: gadget: r8a66597-udc: add support for TEST_MODE")
Cc: stable <stable@xxxxxxxxxxxxxxx>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Acked-by: Felipe Balbi <balbi@xxxxxxxxxx>
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210906094221.GA10957@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/gadget/udc/r8a66597-udc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/usb/gadget/udc/r8a66597-udc.c
+++ b/drivers/usb/gadget/udc/r8a66597-udc.c
@@ -1250,7 +1250,7 @@ static void set_feature(struct r8a66597
 			do {
 				tmp = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
 				udelay(1);
-			} while (tmp != CS_IDST || timeout-- > 0);
+			} while (tmp != CS_IDST && timeout-- > 0);
 
 			if (tmp == CS_IDST)
 				r8a66597_bset(r8a66597,