diff options
| author | Andy Lutomirski <luto@kernel.org> | 2017-04-22 02:19:24 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-25 07:03:46 +0300 |
| commit | c35e30b4727b390ce7a6dd7ead31335320c2b83e (patch) | |
| tree | aa64ff1f4cf011713575f46ca8a57471c0046ac7 | |
| parent | fb0dc3993b537e12ce63511d535ff86efff13c8f (diff) | |
| download | linux-c35e30b4727b390ce7a6dd7ead31335320c2b83e.tar.xz | |
nvme: Add nvme_core.force_apst to ignore the NO_APST quirk
We're probably going to be stuck quirking APST off on an over-broad
range of devices for 4.11. Let's make it easy to override the quirk
for testing.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/nvme/host/core.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 3c9547b94541..d5e0906262ea 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -61,6 +61,10 @@ module_param(default_ps_max_latency_us, ulong, 0644); MODULE_PARM_DESC(default_ps_max_latency_us, "max power saving latency for new devices; use PM QOS to change per device"); +static bool force_apst; +module_param(force_apst, bool, 0644); +MODULE_PARM_DESC(force_apst, "allow APST for newly enumerated devices even if quirked off"); + static LIST_HEAD(nvme_ctrl_list); static DEFINE_SPINLOCK(dev_list_lock); @@ -1562,6 +1566,11 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) } } + if (force_apst && (ctrl->quirks & NVME_QUIRK_NO_DEEPEST_PS)) { + dev_warn(ctrl->dev, "forcibly allowing all power states due to nvme_core.force_apst -- use at your own risk\n"); + ctrl->quirks &= ~NVME_QUIRK_NO_DEEPEST_PS; + } + ctrl->oacs = le16_to_cpu(id->oacs); ctrl->vid = le16_to_cpu(id->vid); ctrl->oncs = le16_to_cpup(&id->oncs); @@ -1584,7 +1593,16 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) ctrl->npss = id->npss; prev_apsta = ctrl->apsta; - ctrl->apsta = (ctrl->quirks & NVME_QUIRK_NO_APST) ? 0 : id->apsta; + if (ctrl->quirks & NVME_QUIRK_NO_APST) { + if (force_apst && id->apsta) { + dev_warn(ctrl->dev, "forcibly allowing APST due to nvme_core.force_apst -- use at your own risk\n"); + ctrl->apsta = 1; + } else { + ctrl->apsta = 0; + } + } else { + ctrl->apsta = id->apsta; + } memcpy(ctrl->psd, id->psd, sizeof(ctrl->psd)); if (ctrl->ops->is_fabrics) { |