linux-kernel - Re: [PATCH] nvme-multipath: Early exit if no path is available

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Message-ID: <20210122175029.GA21127@lst.de>
Date:   Fri, 22 Jan 2021 18:50:29 +0100
From:   Christoph Hellwig <hch@....de>
To:     Daniel Wagner <dwagner@...e.de>
Cc:     linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...com>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>
Subject: Re: [PATCH] nvme-multipath: Early exit if no path is available

On Fri, Jan 22, 2021 at 06:41:25PM +0100, Daniel Wagner wrote:
> nvme_round_robin_path() should test if the return ns pointer is
> valid. nvme_next_ns() will return a NULL pointer if there is no path
> left.

How can that happen once we're in the loop?