Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1282694

RE: [PATCH 0/2] Two fix for dwc2 gadget driver

Show all headers | View raw

> On 11/29/2015 9:29 PM, changbin.du@intel.com wrote:
> > From: "Du, Changbin" <changbin.du@intel.com>
> >
> > With the first patch, enable a enabled ep will return -EBUSY.
> > The second patch forbid queuing on disabled ep to avoid panic.
> 
> 
> The usb_ep->enabled flag was added in 4.4.
> 
> It looks like these same checks are also added at the API level in the
> usb_ep_enable() and usb_ep_disable().
> 
> In case this is bypassed we should probably add them in the gadget
> anyways but using the existing flag.
> 
> Regards,
> John
> 
Hmm, just learnt the flag on gadget API layer. And I just see usb_ep_enable return success if it is already enabled.
But I think it should return an error to inform the caller. Because the ep configuration may probably be changed.
In this case, usb_ep_enable will do different behavior.

Hmm, the usb_ep_queue doesn't check the enabled flag. Should be added. Let me have a try.

Best Regards,
Changbin
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Re: [PATCH 0/2] Two fix for dwc2 gadget driver John Youn <John.Youn@synopsys.com> - 2015-12-03 02:30 +0100
  RE: [PATCH 0/2] Two fix for dwc2 gadget driver "Du, Changbin" <changbin.du@intel.com> - 2015-12-03 05:30 +0100
    [PATCH] usb: gadget: forbid queuing request to a disabled ep changbin.du@intel.com - 2015-12-04 08:30 +0100
      Re: [PATCH] usb: gadget: forbid queuing request to a disabled ep Felipe Balbi <balbi@ti.com> - 2015-12-10 18:30 +0100

csiph-web