On Tue, 2018-03-06 at 22:19 -0500, Douglas Gilbert wrote: > The SCSI PRE-FETCH (10 or 16) command is present both on hard disks > and some SSDs. It is useful when the address of the next block(s) to > be read is known but it is not following the LBA of the current READ > (so read-ahead won't help). It returns two "good" SCSI Status values. > If the requested blocks have fitted (or will most likely fit (when > the IMMED bit is set)) into the disk's cache, it returns CONDITION > MET. If it didn't (or will not) fit then it returns GOOD status. > > The goal of this patch is to stop the SCSI subsystem treating the > CONDITION MET SCSI status as an error. The current state makes the > PRE-FETCH command effectively unusable via pass-throughs. > > A cleanup of the scsi_io_completion() function in scsi_lib.c has > been moved out of this patch to its own patchset titled: > "scsi_io_completion cleanup". Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxx>
