[Intel-wired-lan] [PATCH net v1] iavf: Fix limit of total number of queues to active queues of VF

[Jankowski, Konrad0]

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces at osuosl.org> On Behalf Of
> Karen Sornek
> Sent: środa, 1 września 2021 09:22
> To: intel-wired-lan at lists.osuosl.org
> Cc: Ashwin Vijayavel <ashwin.vijayavel at intel.com>; Sornek, Karen
> <karen.sornek at intel.com>
> Subject: [Intel-wired-lan] [PATCH net v1] iavf: Fix limit of total number of
> queues to active queues of VF
> 
> In the absence of this validation, if the user requests to configure queues
> more than the enabled queues, it results in sending the requested number
> of queues to the kernel stack (due to the asynchronous nature of VF
> response), in which case the stack might pick a queue to transmit that is not
> enabled and result in Tx hang. Fix this bug by limiting the total number of
> queues allocated for VF to active queues of VF.
> 
> Fixes: d5b33d024496 ("i40evf: add ndo_setup_tc callback to i40evf")
> Signed-off-by: Ashwin Vijayavel <ashwin.vijayavel at intel.com>
> Signed-off-by: Karen Sornek <karen.sornek at intel.com>
> ---
>  drivers/net/ethernet/intel/iavf/iavf_main.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/iavf/iavf_main.c
> b/drivers/net/ethernet/intel/iavf/iavf_main.c
> index 80437ef26..c215ca503 100644
> --- a/drivers/net/ethernet/intel/iavf/iavf_main.c
> +++ b/drivers/net/ethernet/intel/iavf/iavf_main.c
> @@ -2647,8 +2647,11 @@ static int iavf_validate_ch_config(struct

Tested-by: Konrad Jankowski <konrad0.jankowski at intel.com>