[PATCH V3 1/1] nvme: Add quirk for LiteON CL1 devices running FW 220TQ,22001

[Gloria Tsai]

Correct, it's device SRAM.


Regards,
Gloria Tsai
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Sales PM Division
Solid State Storage Technology Corporation
TEL: +886-3-612-3888 ext. 2201
E-Mail: gloria.tsai at ssstc.com
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-----Original Message-----
From: Keith Busch <kbusch at kernel.org> 
Sent: Thursday, October 29, 2020 11:15 AM
To: Gloria Tsai <Gloria.Tsai at ssstc.com>
Cc: Jongpil Jung <jongpuls at gmail.com>; Sagi Grimberg <sagi at grimberg.me>; linux-kernel at vger.kernel.org; linux-nvme at lists.infradead.org; Jens Axboe <axboe at fb.com>; dj54.sohn at samsung.com; jongpil19.jung at samsung.com; jongheony.kim at samsung.com; Christoph Hellwig <hch at lst.de>
Subject: Re: [PATCH V3 1/1] nvme: Add quirk for LiteON CL1 devices running FW 220TQ,22001



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On Thu, Oct 29, 2020 at 11:33:06AM +0900, Keith Busch wrote:
> On Thu, Oct 29, 2020 at 02:20:27AM +0000, Gloria Tsai wrote:
> > Corrected the description of this bug that SSD will not do GC after receiving shutdown cmd.
> > Do GC before shutdown -> delete IO Q -> shutdown from host -> 
> > breakup GC -> D3hot -> enter PS4 -> have a chance swap block -> use 
> > wrong pointer on device SRAM -> over program
>
> What do you mean by "wrong pointer"? At the place in the sequence 
> you're referring to, the PCI BME is disabled: you can't access *any* 
> host RAM, so there's no "correct" pointer either.

Re-reading your message, I do see you said "device" rather than "host", so my response may not be relevant.