diff options
| author | Jens Axboe <axboe@kernel.dk> | 2018-05-08 10:25:15 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-16 10:10:30 +0200 |
| commit | 57e2ce8bbacebbfd1c3bd83ddd526207bd6e2c5a (patch) | |
| tree | 23d221f20adb234daa60bff2d3ceef0adb733a86 /drivers/nvme/host | |
| parent | db433f83a81fff62899fd11c0976bb0423f225ea (diff) | |
nvme: add quirk to force medium priority for SQ creation
commit 9abd68ef454c824bfd18629033367b4382b5f390 upstream.
Some P3100 drives have a bug where they think WRRU (weighted round robin)
is always enabled, even though the host doesn't set it. Since they think
it's enabled, they also look at the submission queue creation priority. We
used to set that to MEDIUM by default, but that was removed in commit
81c1cd98351b. This causes various issues on that drive. Add a quirk to
still set MEDIUM priority for that controller.
Fixes: 81c1cd98351b ("nvme/pci: Don't set reserved SQ create flags")
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvme/host')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 5 | ||||
| -rw-r--r-- | drivers/nvme/host/pci.c | 12 |
2 files changed, 16 insertions, 1 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 044af553204c..7ef0a8e1c3e8 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -80,6 +80,11 @@ enum nvme_quirks { * Supports the LighNVM command set if indicated in vs[1]. */ NVME_QUIRK_LIGHTNVM = (1 << 6), + + /* + * Set MEDIUM priority on SQ creation + */ + NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7), }; /* diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index cdd2fd509ddc..eab17405e815 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -947,10 +947,19 @@ static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, static int adapter_alloc_sq(struct nvme_dev *dev, u16 qid, struct nvme_queue *nvmeq) { + struct nvme_ctrl *ctrl = &dev->ctrl; struct nvme_command c; int flags = NVME_QUEUE_PHYS_CONTIG; /* + * Some drives have a bug that auto-enables WRRU if MEDIUM isn't + * set. Since URGENT priority is zeroes, it makes all queues + * URGENT. + */ + if (ctrl->quirks & NVME_QUIRK_MEDIUM_PRIO_SQ) + flags |= NVME_SQ_PRIO_MEDIUM; + + /* * Note: we (ab)use the fact the the prp fields survive if no data * is attached to the request. */ @@ -2523,7 +2532,8 @@ static const struct pci_device_id nvme_id_table[] = { .driver_data = NVME_QUIRK_STRIPE_SIZE | NVME_QUIRK_DEALLOCATE_ZEROES, }, { PCI_VDEVICE(INTEL, 0xf1a5), /* Intel 600P/P3100 */ - .driver_data = NVME_QUIRK_NO_DEEPEST_PS }, + .driver_data = NVME_QUIRK_NO_DEEPEST_PS | + NVME_QUIRK_MEDIUM_PRIO_SQ }, { PCI_VDEVICE(INTEL, 0x5845), /* Qemu emulated controller */ .driver_data = NVME_QUIRK_IDENTIFY_CNS, }, { PCI_DEVICE(0x1c58, 0x0003), /* HGST adapter */ |