Re: [PATCH rdma-next] Revert "IB/isert: Fix incorrect release of isert connection"

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On Mon, Aug 21, 2023 at 11:25:35AM -0500, Mike Christie wrote:
> On 8/21/23 2:57 AM, Leon Romanovsky wrote:
> > From: Leon Romanovsky <leonro@xxxxxxxxxx> Commit: 699826f4e30a ("IB/isert: Fix incorrect release of isert connection") is
> Was the issue described in that commit just not correct? Or was it
> supposed to be for some sort of race'y error path?
> It looks like that analysis was wrong for the normal login/logout path where
> we call:

I came to same conclusion when analyzed Dennis's report.


> 1. isert_init_conn sets kref to 1.
> 2. If we are connected we set kref to 2 via isert_connected_handler -> kref_get
> 3. When we logout from there then isert_wait_conn -> queue_work release_work
> and release_work does isert_put_conn so kref = 1.
> 4. Then we do isert_free_conn which does isert_put_conn to set the kref to 0
> and then free the conn.
> So the patch in this mail looks ok.
> I checked most of the error paths, but I might have missed some. It looks ok
> for them as well.

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