From: sashiko-bot@kernel.org
To: "Sun Yuechi" <sunyuechi@iscas.ac.cn>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH] PCI: Ignore Immediate Readiness on Samsung PM9D3a NVMe
Date: Thu, 22 Oct 2026 06:01:59 +0000 [thread overview]
Message-ID: <sashiko-outbox-181047@kernel.org> (raw)
In-Reply-To: <20261022055814.2566044-1-sunyuechi@iscas.ac.cn>
> The Samsung PM9D3a [144d:a80e] (MZWL63T8HFLT-00B07, firmware LDD5702Q)
> advertises Immediate Readiness, so pcie_flr() doesn't wait after FLR,
> but the drive returns ~0 for up to 6 ms. The config restore runs about
> 1 ms after the FLR, so the BARs and Command register are lost and
> neither vfio-pci nor a rebound nvme driver can reach the device:
>
> pci 0008:01:00.0: reset via flr
> pci 0008:01:00.0: restore config 0x10: 0xffffffff -> 0x10010004
> nvme 0008:01:00.0: error -ENODEV: probe failed
>
> Ignore Immediate Readiness on this device too, so pcie_flr() waits.
>
> Fixes: 10baa9b4df40 ("PCI: Drop unnecessary retries when restoring BARs")
> Signed-off-by: Sun Yuechi <sunyuechi@iscas.ac.cn>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261022055814.2566044-1-sunyuechi@iscas.ac.cn?part=1
prev parent reply other threads:[~2026-10-22 6:02 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-22 5:58 [PATCH] PCI: Ignore Immediate Readiness on Samsung PM9D3a NVMe Sun Yuechi
2026-10-22 6:01 ` sashiko-bot [this message]
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