From mboxrd@z Thu Jan 1 00:00:00 1970 From: luto@kernel.org (Andy Lutomirski) Date: Thu, 19 Jan 2017 11:55:42 -0800 Subject: [PATCH v2 0/2] nvme: APST support Message-ID: As far as I can tell, APST works fine on every NVMe device I'm aware of with the single exception of a particular Samsung device. This series enables APST by default but quirks it off on the offending Samsung device. Some Samsung engineers are taking a look, and, depending on what they find, we may be able to change the quirk to work around the bug rather than disabling APST outright. I think it would be nice to queue this up and give it a soak in linux-next. Changes from v1: - Fix a totally wrong comment in the quirk code (me) - Add a comment about not redetecting quirks after reset (Keith) - Rearrange the series to avoid bisection problems (Jens) Once fully applied, v1 and v2 only differ in their comments. Changes from before: - Rebased to linux-block/for-next. - I added a quirk for the known-bad Samsung device. - It's fully integrated with dev_pm_qos. - I now program APST after all the queues are set up, which seems safer. (This didn't fix the Samsung problem, though.) Andy Lutomirski (2): nvme: Add a quirk mechanism that uses identify_ctrl nvme: Enable autonomous power state transitions drivers/nvme/host/core.c | 214 +++++++++++++++++++++++++++++++++++++++++++++++ drivers/nvme/host/nvme.h | 13 +++ drivers/nvme/host/pci.c | 2 + drivers/nvme/host/rdma.c | 2 + include/linux/nvme.h | 6 ++ 5 files changed, 237 insertions(+) -- 2.9.3