Gennaro Cimmino 3fafb65de7 realtek: l3: rtl930x: remove a prefix route from its own row
otto_l3_nexthop_update() writes a prefix route at its own id, but
removal asked otto_l3_930x_route_lookup_hw() where it was. That search
keys on the masked destination rather than on the route, so any stored
network that covers the address answers, and the answer went straight
into route_write() with the valid bit down.

On a RTL9303 with 10.0.0.0/8 at row 2 and 10.1.2.0/24 at row 3, both
through one gateway, deleting the /24 cleared the /8:

  ... searching for 10.1.2.0
  ... found: 1, index: 2
  ... Got id for prefix route: 2

The table was left holding the route that had just been deleted, while
the one still in the FIB was gone. The hardware answers with the lowest
matching row, which is also why the /24 could not be found afterwards.

Look at the row the route was written at, and fall back to the search
only when the route is not there - checking what it returns, the way the
SDK does around the same lookup: _dal_longan_l3_routeEntry_find()
re-reads the index, compares it with the route, and scans linearly when
it does not match.

RTL930x only: route_lookup_hw is set in otto_l3_930x_cfg alone and the
branch it guards does not run on the other families.

Functionally tested on a Hasivo S1100W-8XGT-SE (RTL9303), kernel
6.18.44, with CONFIG_NET_DSA_RTL83XX_RTL930X_L3_OFFLOAD=y: deleting the
/24 now takes row 3, its own, and leaves 10.0.0.0/8 in place.

Assisted-by: Claude:claude-opus-5
Signed-off-by: Gennaro Cimmino <gcimmino@rayonra.net>
Link: https://github.com/openwrt/openwrt/pull/25194
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
2026-09-15 11:40:10 +02:00
2026-09-13 20:46:35 +01:00
2026-09-14 22:11:20 +02:00
2026-09-12 16:49:17 +02:00
…
…

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