Hi Felipe,
On 11/10/2015 06:52 PM, Felipe F. Tonello wrote:
> This patch fixes a memory leak that occurs when an endpoint fails to enqueue
> the request. If that happens the complete function will never be called, thus
> never freeing the request.
>
> Signed-off-by: Felipe F. Tonello <e...@felipetonello.com>
> ---
> drivers/usb/gadget/function/f_midi.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/gadget/function/f_midi.c
> b/drivers/usb/gadget/function/f_midi.c
> index f36db2d..76ea53c 100644
> --- a/drivers/usb/gadget/function/f_midi.c
> +++ b/drivers/usb/gadget/function/f_midi.c
> @@ -345,6 +345,7 @@ static int f_midi_set_alt(struct usb_function *f,
> unsigned intf, unsigned alt)
> if (err) {
> ERROR(midi, "%s queue req: %d\n",
> midi->out_ep->name, err);
> + free_ep_req(midi->out_ep, req);
> }
> }
>
>
There is one more thing I haven't noticed before. We can have situation
when all requests were allocated successfully, but their allocation
failed. What we get then is set_alt() returning 0, while no request is
allocated, hence the function is, in fact, inactive.
Best regards,
Robert
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