From: Leon Romanovsky <leon@kernel.org>
To: jgg@ziepe.ca, Abhijit Gangurde <abhijit.gangurde@amd.com>
Cc: allen.hubbe@amd.com, nikhil.agarwal@amd.com,
linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org,
Keith Lucas <keith.lucas@oracle.com>,
stable@vger.kernel.org
Subject: Re: [for-next 1/1] RDMA/ionic: Use a linear QID space when udma_shift is zero
Date: Tue, 03 Nov 2026 08:36:46 -0500 [thread overview]
Message-ID: <179371300602.1727061.708492342043734954.b4-ty@kernel.org> (raw)
In-Reply-To: <20261030082402.841751-1-abhijit.gangurde@amd.com>
On Fri, 30 Oct 2026 13:54:02 +0530, Abhijit Gangurde wrote:
> 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.
>
> [...]
Applied, thanks!
[1/1] RDMA/ionic: Use a linear QID space when udma_shift is zero
https://git.kernel.org/rdma/rdma/c/687a1e161457b2
Best regards,
--
Leon Romanovsky <leon@kernel.org>
prev parent reply other threads:[~2026-11-03 13:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 8:24 Abhijit Gangurde
2026-11-03 13:36 ` Leon Romanovsky [this message]
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