diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-04-04 10:11:28 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-22 09:31:04 +0200 |
| commit | be7f2672c341b23eb0b0baea86a89a2d64111fa7 (patch) | |
| tree | 217c8f1ff636c0a7a77de395558f43285112c9bb | |
| parent | 66ea23154df0f9d3e5642f02a3254dd8d95bf0e7 (diff) | |
nvme: refine the Qemu Identify CNS quirk
[ Upstream commit b9a5c3d4c34d8bd9fd75f7f28d18a57cb68da237 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 f0e0af3aa714..d4b388793f40 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1032,6 +1032,19 @@ 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 = { }; @@ -3740,8 +3753,7 @@ 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; } |