[PATCH v5 01/46] usb: gadget: encapsulate endpoint claiming mechanism
r.baldyga at hackerion.com
Thu Aug 20 09:28:14 PDT 2015
On 08/20/2015 05:35 PM, Felipe Balbi wrote:
> just letting you know that this regresses all gadget drivers making them
> try to disable previously disabled endpoints and enable previously
> enabled endpoints.
> I have a possible fix (see below) but then it shows a problem on the
> host side when using with g_zero (see further below):
> commit 3b8932100aacb6cfbffe288ca93025d8b8430c00
> Author: Felipe Balbi <balbi at ti.com>
> Date: Wed Aug 19 18:05:27 2015 -0500
> usb: gadget: fix ep->claimed lifetime
> In order to fix a regression introduced by commit
> cc476b42a39d ("usb: gadget: encapsulate endpoint
> claiming mechanism") we have to introduce a simple
> helper to check if a particular is enabled or not.
> After that, we need to move ep->claimed lifetime to
> usb_ep_enable() and usb_ep_disable() since those
> are the only functions which actually enable and
> disable endpoints.
> A follow-up patch will come to drop all driver_data
> checks from function drivers, since those are, now,
> Fixes: cc476b42a39d ("usb: gadget: encapsulate endpoint
> claiming mechanism")
> Cc: Robert Baldyga <r.baldyga at samsung.com>
> Signed-off-by: Felipe Balbi <balbi at ti.com>
> diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
> index 978435a51038..ad45070cd76f 100644
> --- a/drivers/usb/gadget/epautoconf.c
> +++ b/drivers/usb/gadget/epautoconf.c
> @@ -126,7 +126,6 @@ found_ep:
> ep->address = desc->bEndpointAddress;
> ep->desc = NULL;
> ep->comp_desc = NULL;
> - ep->claimed = true;
Removing this line causes autoconfig can return the same endpoint many
times. This probably causes problems with g_zero.
I will try to fix it ASAP.
More information about the linux-arm-kernel