Hi, Peter Chen <peter.chen@xxxxxxx> writes: > For isoc endpoint descriptor, the wMaxPacketSize is not real max packet > size (see Table 9-13. Standard Endpoint Descriptor, USB 2.0 specifcation), > it may contain the number of packet, so the real max packet should be > ep->desc->wMaxPacketSize && 0x7ff. > > Cc: Felipe F. Tonello <eu@xxxxxxxxxxxxxxxxx> > Cc: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> > Fixes: 16b114a6d797 ("usb: gadget: fix usb_ep_align_maybe > endianness and new usb_ep_aligna") > > Signed-off-by: Peter Chen <peter.chen@xxxxxxx> > --- > include/linux/usb/gadget.h | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h > index 8e81f9e..cce2db6 100644 > --- a/include/linux/usb/gadget.h > +++ b/include/linux/usb/gadget.h > @@ -429,7 +429,10 @@ static inline struct usb_gadget *dev_to_usb_gadget(struct device *dev) > */ > static inline size_t usb_ep_align(struct usb_ep *ep, size_t len) > { > - return round_up(len, (size_t)le16_to_cpu(ep->desc->wMaxPacketSize)); > + int max_packet_size = (size_t)le16_to_cpu(ep->desc->wMaxPacketSize) > + && 0x7ff; > + > + return round_up(len, max_packet_size); > } care to update this to use new usb_endpoint_maxp()? -- balbi
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