linux-kernel - Re: [PATCH V3] rdma_rxe: call comp_handler without holding cq->cq

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Message-ID: <aNYSxX7m58_lXfOp@infradead.org>
Date: Thu, 25 Sep 2025 21:12:53 -0700
From: Christoph Hellwig <hch@...radead.org>
To: Philipp Reisner <philipp.reisner@...bit.com>
Cc: Zhu Yanjun <yanjun.zhu@...ux.dev>, Jason Gunthorpe <jgg@...pe.ca>,
	Leon Romanovsky <leon@...nel.org>, linux-rdma@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] rdma_rxe: call comp_handler without holding
 cq->cq_lock

On Thu, Sep 25, 2025 at 09:56:40PM +0200, Philipp Reisner wrote:
> Allow the comp_handler callback implementation to call ib_poll_cq().

What completion handler is doing this?  And even if someone is doing
folks really should stop calling ib_poll_cq and use the proper CQ
callbacks API anywau.  Please help converting RDS and SMC so that
we can kill the ib_poll_cq export entirely instead of spreading this
brain damage.