[PATCH v3] nvme/pci: Prevent SK hynix PC400 from using Write Zeroes command
Kai-Heng Feng
kai.heng.feng at canonical.com
Thu Jul 23 13:29:10 EDT 2020
After commit 6e02318eaea5 ("nvme: add support for the Write Zeroes
command"), SK hynix PC400 becomes very slow with the following error
message:
[ 224.567695] blk_update_request: operation not supported error, dev nvme1n1, sector 499384320 op 0x9:(WRITE_ZEROES) flags 0x1000000 phys_seg 0 prio class 0]
SK Hynix PC400 has a buggy firmware that treats NLB as max value instead
of a range, so the NLB passed isn't a valid value to the firmware.
According to SK hynix there are three commands are affected:
- Write Zeroes
- Compare
- Write Uncorrectable
Right now only Write Zeroes is implemented, so disable it completely on
SK hynix PC400.
BugLink: https://bugs.launchpad.net/bugs/1872383
Cc: kyounghwan sohn <kyounghwan.sohn at sk.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
---
v3:
- Simply disable Write Zeroes command.
v2:
- SK hynix found the root cause so change the approach accordingly.
- lspci is wrong, the device is PC400 instead of SC300.
drivers/nvme/host/pci.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b1d18f0633c7..25a187e43dbe 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3122,6 +3122,8 @@ static const struct pci_device_id nvme_id_table[] = {
{ PCI_DEVICE(0x1cc1, 0x8201), /* ADATA SX8200PNP 512GB */
.driver_data = NVME_QUIRK_NO_DEEPEST_PS |
NVME_QUIRK_IGNORE_DEV_SUBNQN, },
+ { PCI_DEVICE(0x1c5c, 0x1504), /* SK Hynix PC400 */
+ .driver_data = NVME_QUIRK_DISABLE_WRITE_ZEROES, },
{ PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) },
{ PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001),
.driver_data = NVME_QUIRK_SINGLE_VECTOR },
--
2.17.1
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