Carolina Jubran 9a141d3dc8 IB/IPoIB: Avoid restoring OPER_UP after multicast flush ... ipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to prevent multicast joins while ipoib_mcast_dev_flush() is running, and restores the flag afterwards if it was previously set. This restore races with ipoib_ib_dev_down(). If the interface is brought down while the flush is in progress, ipoib_ib_dev_down() clears IPOIB_FLAG_OPER_UP, but the flush path may set it again after the device has already gone down. Since commit 894021a752 ("IB/ipoib: Make the carrier_on_task race aware"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP being cleared to terminate its rtnl_trylock() retry loop. If the flag is left set after shutdown, the workqueue retries forever, causing teardown to deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while holding RTNL. Instead of overloading IPOIB_FLAG_OPER_UP to block multicast joins during a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag. Use it together with IPOIB_FLAG_OPER_UP to determine whether multicast joins are allowed, avoiding the race with device shutdown. Fixes: 344bacca8c ("IB/ipoib: Don't allow MC joins during light MC flush") Reported-by: Ben Davies <ben.davies@gresearch.co.uk> Signed-off-by: Carolina Jubran <cjubran@nvidia.com> Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com> Signed-off-by: Edward Srouji <edwards@nvidia.com> Link: https://patch.msgid.link/20260902-avoid-rest-oper-up-v1-1-04fcd4916cae@nvidia.com Signed-off-by: Leon Romanovsky <leon@kernel.org>		2026-09-06 02:38:35 -04:00
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ipoib	IB/IPoIB: Avoid restoring OPER_UP after multicast flush	2026-09-06 02:38:35 -04:00
iser	IB/iser: reject a remote invalidation of an unregistered direction	2026-09-02 09:08:10 -04:00
isert	IB/isert: wait for deferred control PDU completions before releasing the connection	2026-09-02 09:11:10 -04:00
rtrs	RDMA/rtrs-clt: Fix CQ pool leak when connect is interrupted	2026-09-03 06:18:46 -04:00
srp	RDMA/srp: Fix srp_remove_target()	2026-09-02 08:58:55 -04:00
srpt	RDMA/srpt: Pass the mapped task attribute to target_init_cmd()	2026-07-22 02:15:16 -04:00
Makefile	RDMA/hfi1: Remove opa_vnic	2026-03-10 07:51:30 -04:00