[PATCH 1/1][SRU][F][G][OEM-5.6] nvme-pci: prevent SK hynix PC400 from using Write Zeroes command

AceLan Kao acelan.kao at canonical.com
Tue Jul 28 08:45:54 UTC 2020

From: Kai-Heng Feng <kai.heng.feng at canonical.com>

After commit 6e02318eaea5 ("nvme: add support for the Write Zeroes
command"), SK hynix PC400 becomes very slow with the following error

[  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>
Signed-off-by: Christoph Hellwig <hch at lst.de>
(cherry picked from commit 5611ec2b9814bc91f7b0a8d804c1fc152e2025d9 nvme/nvme-5.8)
Signed-off-by: AceLan Kao <acelan.kao at canonical.com>
 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 cd64ddb129e5..3208f378a46b 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -3125,6 +3125,8 @@ static const struct pci_device_id nvme_id_table[] = {
 	{ PCI_DEVICE(0x1cc1, 0x8201),   /* ADATA SX8200PNP 512GB */
 		.driver_data = NVME_QUIRK_NO_DEEPEST_PS |
+	{ PCI_DEVICE(0x1c5c, 0x1504),   /* SK Hynix PC400 */
 		.driver_data = NVME_QUIRK_SINGLE_VECTOR },

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