Re: [PATCH net 2/4] eth: bnxt: keep the aRFS rmap updated when TPH is enabled

On Mon, Aug 3, 2026 at 12:31 PM Jakub Kicinski [off-list ref] wrote:

The TPH support must have broken aRFS in bnxt. IRQ can only have one
notifier, so installing the TPH notifier is overriding the one implicitly
installed by irq_cpu_rmap_add().

Make sure we call cpu_rmap_update() from the TPH notifier.

We need to be careful with the ordering and not free the rmap
until we unregistered the notifier. Note that moving the rmap
freeing after the early return in bnxt_free_irq() is fine -
there's no path that could leave rmap with irq_tbl being NULL.

Fixes: c214410c47d6 ("bnxt_en: Add TPH support in BNXT driver")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Reviewed-by: Michael Chan <michael.chan@broadcom.com>