On Mon, Jun 06, 2022 at 11:52:37AM +0100, Ian Abbott wrote:
> The expression for setting the size of the allocated bulk TX buffer
> (`devpriv->usb_tx_buf`) is calling `usb_endpoint_maxp(devpriv->ep_rx)`,
> which is using the wrong endpoint (should be `devpriv->ep_tx`). Fix it.
Bah. Good catch.
> Fixes: a23461c47482 ("comedi: vmk80xx: fix transfer-buffer overflow")
> Cc: Johan Hovold <johan@xxxxxxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx # 5.10, 5.15+
I believe this one is needed in all stable trees (e.g. 4.9+).
> Signed-off-by: Ian Abbott <abbotti@xxxxxxxxx>
> ---
> drivers/comedi/drivers/vmk80xx.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/comedi/drivers/vmk80xx.c b/drivers/comedi/drivers/vmk80xx.c
> index 46023adc5395..4536ed43f65b 100644
> --- a/drivers/comedi/drivers/vmk80xx.c
> +++ b/drivers/comedi/drivers/vmk80xx.c
> @@ -684,7 +684,7 @@ static int vmk80xx_alloc_usb_buffers(struct comedi_device *dev)
> if (!devpriv->usb_rx_buf)
> return -ENOMEM;
>
> - size = max(usb_endpoint_maxp(devpriv->ep_rx), MIN_BUF_SIZE);
> + size = max(usb_endpoint_maxp(devpriv->ep_tx), MIN_BUF_SIZE);
> devpriv->usb_tx_buf = kzalloc(size, GFP_KERNEL);
> if (!devpriv->usb_tx_buf)
> return -ENOMEM;
Looks good otherwise:
Reviewed-by: Johan Hovold <johan@xxxxxxxxxx>
