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The NVMe device in question drops off the PCIe bus after system suspend. I've tried several approaches to workaround this issue, but none of them works: - NVME_QUIRK_DELAY_BEFORE_CHK_RDY - NVME_QUIRK_NO_DEEPEST_PS - Disable APST before controller shutdown - Delay between controller shutdown and system suspend - Explicitly set power state to 0 before controller shutdown Fortunately it's a desktop, so disable APST won't hurt the battery. Also, change the quirk function name to reflect it's for vendor combination quirks. BugLink: https://bugs.launchpad.net/bugs/1705748 Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Christoph Hellwig <hch@lst.de>