RDMA/erdma: Use IRQ-safe XArray helpers for QP and CQ tables

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Locked QP and CQ lookups from EQ interrupts can deadlock with
create-path XArray updates. If an interrupt arrives while the create
path holds the plain xa_lock, the lookup spins forever trying to
acquire the same lock.

Use IRQ-safe XArray helpers for all QP and CQ create-path updates,
including the GSI QP store and error paths. Initialize both arrays with
XA_FLAGS_LOCK_IRQ so sleeping allocations preserve interrupt state.

Fixes: 98df2aee14 ("RDMA/erdma: Hold CQ references when processing EQ events")
Fixes: a52eeff320 ("RDMA/erdma: Hold QP references for AE and CM processing")
Signed-off-by: Cheng Xu <chengyou@linux.alibaba.com>
Link: https://patch.msgid.link/20260828030344.88021-1-chengyou@linux.alibaba.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

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Cheng Xu 2026-08-28 11:03:44 +08:00 • committed by Leon Romanovsky

parent 3476c28c9a

commit 00baeade70

2 changed files with 11 additions and 11 deletions

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4

drivers/infiniband/hw/erdma/erdma_main.c

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18

drivers/infiniband/hw/erdma/erdma_verbs.c

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