On Wed, Oct 24, 2018 at 10:41:47PM +0200, Ladislav Michl wrote:
> Gadget update to 3.15 imported Linux patch e117e742d310 ("usb:
> gadget: add "maxpacket_limit" field to struct usb_ep"):
>
> This patch adds "maxpacket_limit" to struct usb_ep. This field contains
> maximum value of maxpacket supported by driver, and is set in driver probe.
> This value should be used by autoconfig() function, because value of field
> "maxpacket" is set to value from endpoint descriptor when endpoint becomes
> enabled. So when autoconfig() function will be called again for this endpoint,
> "maxpacket" value will contain wMaxPacketSize from descriptior instead of
> maximum packet size for this endpoint.
>
> For this reason this patch adds new field "maxpacket_limit" which contains
> value of maximum packet size (which defines maximum endpoint capabilities).
> This value is used in ep_matches() function used by autoconfig().
>
> Value of "maxpacket_limit" should be set in UDC driver probe function, using
> usb_ep_set_maxpacket_limit() function, defined in gadget.h. This function
> set choosen value to both "maxpacket_limit" and "maxpacket" fields.
>
> However said update didn't bring in all driver changes. Do it now.
>
> Fixes: 2776d53d7ac8 ("USB: gadget: Update to 3.15")
> Signed-off-by: Ladislav Michl <ladis@xxxxxxxxxxxxxx>
> ---
> Please note, that this patch was created to fix
> simear4:/ usbgadget -a
> multi_bind: creating ACM function
> g_multi usbgadget: acm/23b68c88: can't bind, err -19
> g_multi udc0: failed to start g_multi: -19
> usbgadget: No such device
> on at91_udc (autoconfig() was failing).
> Thus fsl_udc and pxa27x_udc changes are untested.
Tested on fsl_udc and applied, thanks
Sascha
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