Now that we have a helper to gather periodic
endpoints' multiplier bits from wMaxPacketSize and
every driver is using it, we can safely make sure
that usb_endpoint_maxp() returns only bits 10:0 of
wMaxPacketSize which is where the actual packet size
lies.
(backported from linux commit abb621844f6a0c93bbc934f9a096752c4c1c5722)
Signed-off-by: Jules Maselbas <jmaselbas@xxxxxxxxx>
---
include/usb/ch9.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/usb/ch9.h b/include/usb/ch9.h
index fc6ec862c..5adabcaee 100644
--- a/include/usb/ch9.h
+++ b/include/usb/ch9.h
@@ -401,6 +401,7 @@ struct usb_endpoint_descriptor {
#define USB_ENDPOINT_XFER_INT 3
#define USB_ENDPOINT_MAX_ADJUSTABLE 0x80
+#define USB_ENDPOINT_MAXP_MASK 0x07ff
#define USB_EP_MAXP_MULT_SHIFT 11
#define USB_EP_MAXP_MULT_MASK (3 << USB_EP_MAXP_MULT_SHIFT)
#define USB_EP_MAXP_MULT(m) \
@@ -620,11 +621,11 @@ usb_endpoint_maxp_mult(const struct usb_endpoint_descriptor *epd)
* usb_endpoint_maxp - get endpoint's max packet size
* @epd: endpoint to be checked
*
- * Returns @epd's max packet
+ * Returns @epd's max packet bits [10:0]
*/
static inline int usb_endpoint_maxp(const struct usb_endpoint_descriptor *epd)
{
- return __le16_to_cpu(epd->wMaxPacketSize);
+ return __le16_to_cpu(epd->wMaxPacketSize) & USB_ENDPOINT_MAXP_MASK;
}
static inline int usb_endpoint_interrupt_type(
--
2.21.0.196.g041f5ea
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
