-----Original Message-----
From: Intel-wired-lan <redacted> On Behalf
Of Stanislav Fomichev
Sent: Wednesday, March 18, 2026 4:03 PM
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Subject: [Intel-wired-lan] [PATCH net-next v2 03/13] net: introduce
ndo_set_rx_mode_async and dev_rx_mode_work

Add ndo_set_rx_mode_async callback that drivers can implement instead
of the legacy ndo_set_rx_mode. The legacy callback runs under the
netif_addr_lock spinlock with BHs disabled, preventing drivers from
sleeping. The async variant runs from a work queue with rtnl_lock and
netdev_lock_ops held, in fully sleepable context.

When __dev_set_rx_mode() sees ndo_set_rx_mode_async, it schedules
dev_rx_mode_work instead of calling the driver inline. The work
function takes two snapshots of each address list (uc/mc) under the
addr_lock, then drops the lock and calls the driver with the work
copies. After the driver returns, it reconciles the snapshots back to
the real lists under the lock.

Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
---
 Documentation/networking/netdevices.rst |  8 +++
 include/linux/netdevice.h               | 20 ++++++
 net/core/dev.c                          | 94 +++++++++++++++++++++++-
-
 3 files changed, 115 insertions(+), 7 deletions(-)

diff --git a/Documentation/networking/netdevices.rst

b/Documentation/networking/netdevices.rst
index 35704d115312..dc83d78d3b27 100644

--- a/Documentation/networking/netdevices.rst
+++ b/Documentation/networking/netdevices.rst

@@ -289,6 +289,14 @@ struct net_device synchronization rules
 ndo_set_rx_mode:
 	Synchronization: netif_addr_lock spinlock.
 	Context: BHs disabled