scsi: virtio_scsi: Drop DID_TARGET_FAILURE use

DID_TARGET_FAILURE is internal to the SCSI layer. Drivers must not use it
because:

 1. It's not propagated upwards, so SG IO/passthrough users will not see an
    error and think a command was successful.

 2. There is no handling for it in scsi_decide_disposition() so it results
    in entering SCSI error handling.

virtio_scsi gets this when something like qemu returns
VIRTIO_SCSI_S_TARGET_FAILURE.  It looks like qemu returns that error code
if a host OS returns it, but this shouldn't happen for Linux since we never
propagate that error to userspace.

This has us use DID_BAD_TARGET in case some other virt layer is returning
it. In that case we will still get a hard error like before and it conveys
something unexpected happened.

Link: https://lore.kernel.org/r/[email protected]
Acked-by: Paolo Bonzini <[email protected]>
Acked-by: Michael S. Tsirkin <[email protected]>
Signed-off-by: Mike Christie <[email protected]>
Signed-off-by: Martin K. Petersen <[email protected]>

0 files changed, 0 insertions, 0 deletions