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| author | Christoph Hellwig <hch@lst.de> | 2020-04-04 10:11:28 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-05-09 16:18:35 -0600 |
| commit | b9a5c3d4c34d8bd9fd75f7f28d18a57cb68da237 (patch) | |
| tree | ffa074b6fbc76a4c92b2ec48a868358f9288abda /drivers/nvme | |
| parent | e4fcc72c1a420bdbe425530dd19724214ceb44ec (diff) | |
| download | linux-b9a5c3d4c34d8bd9fd75f7f28d18a57cb68da237.tar.gz linux-b9a5c3d4c34d8bd9fd75f7f28d18a57cb68da237.tar.bz2 linux-b9a5c3d4c34d8bd9fd75f7f28d18a57cb68da237.zip | |
nvme: refine the Qemu Identify CNS quirk
Add a helper to check if we can use Identify CNS values > 1, and refine
the Qemu quirk to not apply to reported versions larger than 1.1, as the
Qemu implementation had been fixed by then.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/core.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 3d0c7d90ad25..a9af83918afe 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1027,6 +1027,19 @@ void nvme_stop_keep_alive(struct nvme_ctrl *ctrl) } EXPORT_SYMBOL_GPL(nvme_stop_keep_alive); +/* + * In NVMe 1.0 the CNS field was just a binary controller or namespace + * flag, thus sending any new CNS opcodes has a big chance of not working. + * Qemu unfortunately had that bug after reporting a 1.1 version compliance + * (but not for any later version). + */ +static bool nvme_ctrl_limited_cns(struct nvme_ctrl *ctrl) +{ + if (ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS) + return ctrl->vs < NVME_VS(1, 2, 0); + return ctrl->vs < NVME_VS(1, 1, 0); +} + static int nvme_identify_ctrl(struct nvme_ctrl *dev, struct nvme_id_ctrl **id) { struct nvme_command c = { }; @@ -3814,8 +3827,7 @@ static void nvme_scan_work(struct work_struct *work) mutex_lock(&ctrl->scan_lock); nn = le32_to_cpu(id->nn); - if (ctrl->vs >= NVME_VS(1, 1, 0) && - !(ctrl->quirks & NVME_QUIRK_IDENTIFY_CNS)) { + if (!nvme_ctrl_limited_cns(ctrl)) { if (!nvme_scan_ns_list(ctrl, nn)) goto out_free_id; } |