Hi Alexey,
On Mon, Jun 10, 2013 at 9:29 PM, Alexey Khoroshilov
<khoroshilov@xxxxxxxxx> wrote:
> ft1000dev->tx_urb and ft1000dev->rx_urb are not deallocated
> if something goes wrong in ft1000_probe(). Also there is no
> check for success of urb allocation. The patch fixes the both issues.
>
> By the way, there is no sense in GFP_ATOMIC for urb allocation here,
> so it is changed to GFP_KERNEL.
>
> Found by Linux Driver Verification project (linuxtesting.org).
>
> Signed-off-by: Alexey Khoroshilov <khoroshilov@xxxxxxxxx>
> ---
> drivers/staging/ft1000/ft1000-usb/ft1000_usb.c | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_usb.c b/drivers/staging/ft1000/ft1000-usb/ft1000_usb.c
> index 614db55..29a7cd2 100644
> --- a/drivers/staging/ft1000/ft1000-usb/ft1000_usb.c
> +++ b/drivers/staging/ft1000/ft1000-usb/ft1000_usb.c
> @@ -79,8 +79,12 @@ static int ft1000_probe(struct usb_interface *interface,
> ft1000dev->dev = dev;
> ft1000dev->status = 0;
> ft1000dev->net = NULL;
> - ft1000dev->tx_urb = usb_alloc_urb(0, GFP_ATOMIC);
> - ft1000dev->rx_urb = usb_alloc_urb(0, GFP_ATOMIC);
> + ft1000dev->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
Can we check return value for tx here? If allocation fails it makes no sense to
try allocate also rx. Otherwise looks good. Thanks.
> + ft1000dev->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
Same for rx here.
> + if (!ft1000dev->tx_urb || !ft1000dev->rx_urb) {
> + ret = -ENOMEM;
> + goto err_fw;
> + }
>
> DEBUG("ft1000_probe is called\n");
> numaltsetting = interface->num_altsetting;
> @@ -209,6 +213,8 @@ err_thread:
> err_load:
> kfree(pFileStart);
> err_fw:
> + usb_free_urb(ft1000dev->rx_urb);
> + usb_free_urb(ft1000dev->tx_urb);
> kfree(ft1000dev);
> return ret;
> }
> --
> 1.8.1.2
>
marek
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