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Commit 5611ec2b authored by Kai-Heng Feng's avatar Kai-Heng Feng Committed by Christoph Hellwig
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nvme-pci: prevent SK hynix PC400 from using Write Zeroes command

After commit 6e02318e ("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: default avatarKai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent adc99fd3
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