Hi Marek,
Thank you for the patch.
On dim., juin 09, 2024 at 23:32, Marek Vasut
wrote:
> If .match_ep() callback returns non-NULL endpoint, immediately check
> its usability and if the returned endpoint is usable, stop search and
> return the endpoint. Otherwise, continue with best effort search for
> usable endpoint.
>
> Currently the code would attempt the best effort search in any case,
> which may find another unexpected endpoint. It is likely that the
> intention of the original code was to stop the search early.
>
> Fixes: 77dcbdf3c1ce ("usb: gadget: Add match_ep() op to usb_gadget_ops")
> Signed-off-by: Marek Vasut
I've added Vignesh to the CC list since he is the author of
77dcbdf3c1ce. He might be able to comment if this was indeed a mistake.
It looks like a good fix to me as well. With this change we match more closely
the linux implementation (usb_ep_autoconfig_ss()).
Reviewed-by: Mattijs Korpershoek
Tested-by: Mattijs Korpershoek # on vim3
> ---
> Cc: Alexander Sverdlin
> Cc: Felipe Balbi
> Cc: Lukasz Majewski
> Cc: Mattijs Korpershoek
> Cc: Nishanth Menon
> Cc: Simon Glass
> Cc: Thinh Nguyen
> Cc: Tom Rini
> Cc: u-boot@lists.denx.de
> ---
> drivers/usb/gadget/epautoconf.c | 5 -
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
> index 09950ceeaed..66599ce8efa 100644
> --- a/drivers/usb/gadget/epautoconf.c
> +++ b/drivers/usb/gadget/epautoconf.c
> @@ -247,8 +247,11 @@ struct usb_ep *usb_ep_autoconfig(
> return ep;
> }
>
> - if (gadget->ops->match_ep)
> + if (gadget->ops->match_ep) {
> ep = gadget->ops->match_ep(gadget, desc, NULL);
> + if (ep && ep_matches(gadget, ep, desc))
> + return ep;
> + }
>
> /* Second, look at endpoints until an unclaimed one looks usable */
> list_for_each_entry(ep, >ep_list, ep_list) {
> --
> 2.43.0
