Re: [PATCH] nvme-pci: Avoid to go into d3cold if device can't use npss.
From: Keith Busch <kbusch@kernel.org>
Date: 2021-05-26 02:49:39
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linux-pci, lkml
On Wed, May 26, 2021 at 10:02:27AM +0800, Koba Ko wrote:
On Tue, May 25, 2021 at 3:44 PM Christoph Hellwig [off-list ref] wrote:quoted
On Thu, May 20, 2021 at 11:33:15AM +0800, Koba Ko wrote:quoted
After resume, host can't change power state of the closed controller from D3cold to D0.Why?As per Kai-Heng said, it's a regression introduced by commit b97120b15ebd ("nvme-pci: use simple suspend when a HMB is enabled"). The affected NVMe is using HMB.
That really doesn't add up. The mentioned commit restores the driver behavior for HMB drives that existed prior to d916b1be94b6d from kernel 5.3. Is that NVMe device broken in pre-5.3 kernels, too? _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme