On Wed, Mar 04, 2020 at 10:51:14AM +0800, light.hsieh@xxxxxxxxxxxx wrote: > From: Light Hsieh <light.hsieh@xxxxxxxxxxxx> > > For storage device with write-protection support, e.g. eMMC, register > check_disk_range_wp() in struct block_device_operations for checking > write-protection status. When creating block device for a partition, set > read/write policy according to result of check_disk_range_wp() operation > (if registered). > > Without this patch, ro attribute is not set for created block device of > write-protected partition. User perform asynchronous buffered write to > such partition won't get immediate error and therefore he won't be awared > that write is not actually performed. > With this patch, ro attribute is set for created block device of > write-protected partition. User perform asynchronous buffered write to > such partition will get immediate error and therefore he will be awared. NAK. This is complete BS. Partitions are a complete software concepts and idiotic features like a range read only should not interact with it at all (and I urge all Linux users to never make use of such broken features, so the less support we have for them, the better).
