bnxt_en: Update MRU and RSS table of RSS contexts on queue reset

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[ Upstream commit 5dacc94c6f ]

The commit under the Fixes tag below which updates the VNICs' RSS
and MRU during .ndo_queue_start(), needs to be extended to cover any
non-default RSS contexts which have their own VNICs.  Without this
step, packets that are destined to a non-default RSS context may be
dropped after .ndo_queue_start().

We further optimize this scheme by updating the VNIC only if the
RX ring being restarted is in the RSS table of the VNIC.  Updating
the VNIC (in particular setting the MRU to 0) will momentarily stop
all traffic to all rings in the RSS table.  Any VNIC that has the
RX ring excluded from the RSS table can skip this step and avoid the
traffic disruption.

Note that this scheme is just an improvement.  A VNIC with multiple
rings in the RSS table will still see traffic disruptions to all rings
in the RSS table when one of the rings is being restarted.  We are
working on a FW scheme that will improve upon this further.

Fixes: 5ac066b7b0 ("bnxt_en: Fix queue start to update vnic RSS table")
Reported-by: David Wei <dw@davidwei.uk>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Link: https://patch.msgid.link/20250613231841.377988-4-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Pavan Chebbi 2025-06-13 16:18:41 -07:00 • committed by Greg Kroah-Hartman

parent 672b9d85bd

commit 1f755ba8ab

1 changed files with 51 additions and 5 deletions

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drivers/net/ethernet/broadcom/bnxt/bnxt.c

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