From: sashiko-bot@kernel.org
To: "Abhijit Gangurde" <abhijit.gangurde@amd.com>
Cc: linux-rdma@vger.kernel.org
Subject: Re: [for-next 1/1] RDMA/ionic: Use a linear QID space when udma_shift is zero
Date: Fri, 30 Oct 2026 08:29:47 +0000 [thread overview]
Message-ID: <sashiko-outbox-190690@kernel.org> (raw)
In-Reply-To: <20261030082402.841751-1-abhijit.gangurde@amd.com>
> Firmware reports udma_shift as the log2 of the number of queues in
> a queue group. A value of zero means the queues are not striped
> across two UDMAs, so the QID space is linear and the device has one UDMA.
>
> The interleaved bitid/qid transform treats bit 0 as the UDMA selector
> when the group shift is zero. QID 1 then becomes bitid
> 1 << half_qid_shift, and freeing that QID releases the wrong allocator
> index. Skip the transform and select one UDMA so QP and CQ allocation
> uses the QID directly.
>
> Fixes: e8521822c733 ("RDMA/ionic: Register device ops for control path")
> Reported-by: Keith Lucas <keith.lucas@oracle.com>
> Link: https://lore.kernel.org/r/20261021161651.4020222-1-haakon.bugge@oracle.com
> Cc: stable@vger.kernel.org # 6.18
> Signed-off-by: Abhijit Gangurde <abhijit.gangurde@amd.com>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261030082402.841751-1-abhijit.gangurde@amd.com?part=1
prev parent reply other threads:[~2026-10-30 8:29 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 8:24 [for-next 1/1] RDMA/ionic: Use a linear QID space when udma_shift is zero Abhijit Gangurde
2026-10-30 8:29 ` sashiko-bot [this message]
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