[SRU][N][PATCH 0/3] FTBFS: bcmasp phylib managed-EEE backport missing prerequisites

[Alice C. Munduruca]

[ Impact ]

Noble kernels with CONFIG_BCMASP=m fail to build from
source due to a broken commit from noble-stable-2026-06-16
whose defect is latent in the generic/master kernel —
master does not compile the Broadcom ASP2 driver — but
becomes a fatal compile error on any arm64 kernel which
enables the config above.

compiling drivers/net/ethernet/broadcom/asp2/bcmasp_intf.o:

bcmasp_intf.c:675:37: error: 'struct phy_device' has no member named 'eee_cfg'
bcmasp_intf.c:677:27: error: 'struct phy_device' has no member named 'enable_tx_lpi'
bcmasp_intf.c:1081:23: error: 'struct phy_device' has no member named 'eee_cfg'
bcmasp_intf.c:1364:41: error: 'struct phy_device' has no member named 'eee_cfg'
bcmasp_intf.c:1416:53: error: 'struct phy_device' has no member named 'eee_cfg'

Commit e57cfd7faf78 (“net: bcm: asp2: convert to phylib
managed EEE”, upstream 21f56ad1b211) was pulled in only
as Stable-dep-of: cbfa5be2bf64 (“net: bcmasp: fix double
free of WoL irq”). The conversion makes the driver consume
phylib managed-EEE fields (phydev->eee_cfg,
phydev->enable_tx_lpi) whose infrastructure was never
backported to Noble 6.8 — the managed-EEE consumer was
dragged in without its infrastructure. The commit is
present in master tags (132.x → 136.136) but master CI
stays green because it does not build this driver.

[ Fix ]

Revert of any managed-EEE patches. These three EEE commits
sit on top of a stack of fix commits needed by this driver,
(including a CVE fix) and so manual intervention when
reverting commit #1 in the table below was needed. This
mostly consisted in context adjustment when adding back in
eee-related fields in certain bcm structs.

 #  Reverted commit  Subject
 1  e57cfd7faf78     net: bcm: asp2: convert to phylib managed EEE
 2  8d2cc390d968     net: bcm: asp2: remove tx_lpi_enabled
 3  d1943caf8cd3     net: bcm: asp2: fix LPI timer handling

[ Test Plan ]

Set CONFIG_BCMASP=m in kernel annotations.

Compile Kernel with the following patches applied, and
ensure no errors terminate compilation.

[ Other Info ]

Culprit commit: e57cfd7faf78 (bcmasp managed-EEE), in
Ubuntu-6.8.0-136.136.

Most of the writing above and work on the following patches
was done by the excelent Kuan-Ying Lee who made an initial
set of reverts for noble:linux-raspi. Given that some of
those reverted patches were important fixes, I've gone
ahead and made some modifications to bring them back.

Alice C. Munduruca (3):
  UBUNTU: SAUCE: Revert "net: bcm: asp2: convert to phylib managed EEE"
  UBUNTU: SAUCE: Revert "net: bcm: asp2: remove tx_lpi_enabled"
  UBUNTU: SAUCE: Revert "net: bcm: asp2: fix LPI timer handling"

 drivers/net/ethernet/broadcom/asp2/bcmasp.h   |  4 ++
 .../ethernet/broadcom/asp2/bcmasp_ethtool.c   | 39 +++++++++++++++++++
 .../net/ethernet/broadcom/asp2/bcmasp_intf.c  | 22 ++++-------
 3 files changed, 51 insertions(+), 14 deletions(-)

-- 
2.53.0