usb: core: config: using bit mask instead of individual bits

Using standard USB_EP_MAXP_MULT_MASK instead of individual bits for
extracting multiple-transactions bits from wMaxPacketSize value.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Pavel Hofman <pavel.hofman@ivitera.com>
Link: https://lore.kernel.org/r/20211210085219.16796-2-pavel.hofman@ivitera.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index e3c3a73..48bc8a4 100644 (file)
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -422,9 +422,9 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno,
                maxpacket_maxes = full_speed_maxpacket_maxes;
                break;
        case USB_SPEED_HIGH:
-               /* Bits 12..11 are allowed only for HS periodic endpoints */
+               /* Multiple-transactions bits are allowed only for HS periodic endpoints */
                if (usb_endpoint_xfer_int(d) || usb_endpoint_xfer_isoc(d)) {
-                       i = maxp & (BIT(12) | BIT(11));
+                       i = maxp & USB_EP_MAXP_MULT_MASK;
                        maxp &= ~i;
                }
                fallthrough;