Re: [PATCH v2 3/4] net/ice: fix Rx queue count reporting after TM commit

[Bruce Richardson <bruce.richardson@intel.com>]

On Mon, Sep 07, 2026 at 01:07:49PM +0000, Ciara Loftus wrote:
> Currently, ice_dev_info_get() assigns the value of `vsi->nb_qps` to both
> `max_rx_queues` and `max_tx_queues`.
> 
> After a Tx scheduler hierarchy is committed, the value of nb_qps may grow
> to reflect the VSI's larger Tx scheduler capacity. However the Tx scheduler
> hierarchy change has no effect on the VSI's Rx queue allocation,
> which stays fixed at its original size for the life of the port. An
> application can then request more Rx queues than the VSI's actual Rx
> resources support when the inflated nb_qps is assigned to `max_rx_queues`.
> 
> `vsi->nb_qps` also feeds `ice_vsi_disable_queues_intr()`, which clears
> both Rx and Tx queue interrupt registers by absolute queue index on
> every port stop. Once `nb_qps` grows past the VSI's fixed queue window,
> this can clear interrupt registers belonging to a different VSI.
> 
> Fix this by introducing `vsi->nb_tm_txqs` to track the Tx scheduler
> capacity as it grows, leaving `vsi->nb_qps` as the VSI's fixed
> queue allocation for the life of the port. `ice_vsi_disable_queues_intr()`
> is switched to `nb_used_qps`, which already tracks the actually configured
> queue count.
> 
> Fixes: 715d449a965b ("net/ice: enhance Tx scheduler hierarchy support")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
> v2:
> * renamed nb_tm_qps to nb_tm_txqs
> ---
>  drivers/net/intel/ice/ice_ethdev.c | 5 +++--
>  drivers/net/intel/ice/ice_ethdev.h | 1 +
>  drivers/net/intel/ice/ice_tm.c     | 8 ++++----
>  3 files changed, 8 insertions(+), 6 deletions(-)
>