Merge branch 'virtio-fixes-for-tx-ring-sizing-and-resize-error-reporting'

Laurent Vivier says:

====================
virtio: Fixes for TX ring sizing and resize error reporting

This patch series contains two fixes and a cleanup for the virtio subsystem.

The first patch fixes an error reporting bug in virtio_ring's
virtqueue_resize() function. Previously, errors from internal resize
helpers could be masked if the subsequent re-enabling of the virtqueue
succeeded. This patch restores the correct error propagation, ensuring that
callers of virtqueue_resize() are properly informed of underlying resize
failures.

The second patch does a cleanup of the use of '2+MAX_SKB_FRAGS'

The third patch addresses a reliability issue in virtio_net where the TX
ring size could be configured too small, potentially leading to
persistently stopped queues and degraded performance. It enforces a
minimum TX ring size to ensure there's always enough space for at least one
maximally-fragmented packet plus an additional slot.
====================

Link: https://patch.msgid.link/20250521092236.661410-1-lvivier@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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