Re: [PATCH 4.4 128/268] scsi: sd: Keep disk read-only when re-reading partition

From: Martin K. Petersen
Date: Thu Jun 14 2018 - 21:42:07 EST

Hi Ben,

> (The log message about Write Protect status also reports the
> underlying SCSI device flag and not the combined ro flag, but maybe
> that was intentional.)

I'd prefer for the printk in question to reflect the device-reported
state, not the state of the block device.

> I think this commit should be reverted, both in stable and upstream.
> A proper fix would involve splitting the ro flag into two flagsâone
> controlled by user-space and one read from the deviceâwith the
> effective read-only status being the logical-or of those two.

I don't have a problem with distinguishing between current state and an
override flag in the block layer. However, I think an incremental patch
to fix that up is fine. SCSI devices don't typically switch write
protection state on a whim.

Martin K. Petersen Oracle Linux Engineering