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

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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>
This commit is contained in:
Pavel Hofman 2021-12-10 09:52:19 +01:00 committed by Greg Kroah-Hartman
parent 1a3910c809
commit ca57373969
1 changed files with 2 additions and 2 deletions
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4
drivers/usb/core/config.c
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@ -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;