On 12/05/2017 02:52 PM, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
> Date: Tue, 5 Dec 2017 22:40:30 +0100
>
> Add a jump target so that a bit of exception handling can be better reused
> at the end of this function.
>
> Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/usb/usbip/stub_rx.c | 22 ++++++++++------------
> 1 file changed, 10 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/usb/usbip/stub_rx.c b/drivers/usb/usbip/stub_rx.c
> index a70eb81823a3..f46d71abd2f9 100644
> --- a/drivers/usb/usbip/stub_rx.c
> +++ b/drivers/usb/usbip/stub_rx.c
> @@ -445,29 +445,23 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
> else
> priv->urb = usb_alloc_urb(0, GFP_KERNEL);
>
> - if (!priv->urb) {
> - usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
> - return;
> - }
> + if (!priv->urb)
> + goto add_event_malloc_failure;
>
> /* allocate urb transfer buffer, if needed */
> if (pdu->u.cmd_submit.transfer_buffer_length > 0) {
> priv->urb->transfer_buffer =
> kzalloc(pdu->u.cmd_submit.transfer_buffer_length,
> GFP_KERNEL);
> - if (!priv->urb->transfer_buffer) {
> - usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
> - return;
> - }
> + if (!priv->urb->transfer_buffer)
> + goto add_event_malloc_failure;
> }
>
> /* copy urb setup packet */
> priv->urb->setup_packet = kmemdup(&pdu->u.cmd_submit.setup, 8,
> GFP_KERNEL);
> - if (!priv->urb->setup_packet) {
> - usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
Please see comments on my comments on the previous patch in this series.
This patch depends on the patch that is incorrect.
> - return;
> - }
> + if (!priv->urb->setup_packet)
> + goto add_event_malloc_failure;
>
> /* set other members from the base header of pdu */
> priv->urb->context = (void *) priv;
> @@ -507,6 +501,10 @@ static void stub_recv_cmd_submit(struct stub_device *sdev,
> }
>
> usbip_dbg_stub_rx("Leave\n");
> + return;
> +
> +add_event_malloc_failure:
> + usbip_event_add(ud, SDEV_EVENT_ERROR_MALLOC);
> }
>
> /* recv a pdu */
>
I am restructuring this routine to fix a bug and so it stands now,
I don't see a value in taking this patch that doesn't really fix
any specific bug.
thanks,
-- Shuah
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