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SubjectRe: [PATCH 2/2] usb: gadget: f_midi: check for error on usb_ep_queue
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Hello.

On 9/18/2015 8:12 PM, eu@felipetonello.com wrote:

> From: "Felipe F. Tonello" <eu@felipetonello.com>
>
> f_midi is not checking weather the is an error on usb_ep_queue
> request, ignoring potential problems, such as memory leaks.
>
> Signed-off-by: Felipe F. Tonello <eu@felipetonello.com>
> ---
> drivers/usb/gadget/function/f_midi.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/usb/gadget/function/f_midi.c b/drivers/usb/gadget/function/f_midi.c
> index ad50a67..a5e446d 100644
> --- a/drivers/usb/gadget/function/f_midi.c
> +++ b/drivers/usb/gadget/function/f_midi.c
> @@ -543,8 +543,14 @@ static void f_midi_transmit(struct f_midi *midi, struct usb_request *req)
> }
> }
>
> - if (req->length > 0)
> - usb_ep_queue(ep, req, GFP_ATOMIC);
> + if (req->length > 0) {
> + int err;
> +
> + err = usb_ep_queue(ep, req, GFP_ATOMIC);
> + if (err < 0)
> + ERROR(midi, "%s queue req: %d\n",
> + midi->out_ep->name, err);
> + }
> else

} else {

> free_ep_req(ep, req);

}

> }

The lines added above show the proper kernel CodingStyle. } should be on
the same line as *else* and {} should be used in all branches of the *if*
statement if at least one branch has them.

MBR, Sergei



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