nvme-pci: prevent SK hynix PC400 from using Write Zeroes command

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After commit 6e02318eae ("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@sk.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

...

This commit is contained in:

Kai-Heng Feng 2020-07-24 01:29:10 +08:00 • committed by Christoph Hellwig

parent adc99fd378

commit 5611ec2b98

1 changed files with 2 additions and 0 deletions

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drivers/nvme/host/pci.c

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