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Date: Mon, 26 Jul 2021 08:24:34 -0700 From: Keith Busch <kbusch@...nel.org> To: shiva.linuxworks@...il.com Cc: rjw@...ysocki.net, pavel@....cz, len.brown@...el.com, linux-pm@...r.kernel.org, axboe@...com, hch@....de, sagi@...mberg.me, linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org, Shivamurthy Shastri <sshivamurthy@...ron.com> Subject: Re: [PATCH v2 0/2] Abrupt Shutdown for NVMe SSD On Mon, Jul 26, 2021 at 01:22:21PM +0000, shiva.linuxworks@...il.com wrote: > In the platform with a limited backup power supply, devices like NVMe > SSD does unsafe shutdown. > > These two patches address this issue by adding a power loss imminent > flag. The platform will enable the power loss imminent flag if the > platform's power is running on the limited backup power supply. During > the shutdown, the driver checks this information and pwerforms the > abrupt shutdown. I think the pm framework and nvme usage are ok, but you need a platform specific caller to set the new power loss flag before this should be considered, otherwise this is just unreachable code.
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