scsi: core: Remove useless host error codes

The host codes that were supposed to only be used for internal use are now
not used, so remove them.

Link: https://lore.kernel.org/r/20220812010027.8251-11-michael.christie@oracle.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/include/scsi/scsi_status.h b/include/scsi/scsi_status.h
index 31d30ce..9cb8526 100644 (file)
--- a/include/scsi/scsi_status.h
+++ b/include/scsi/scsi_status.h
@@ -62,12 +62,12 @@ enum scsi_host_status {
                                         * recover the link. Transport class will
                                         * retry or fail IO */
        DID_TRANSPORT_FAILFAST = 0x0f, /* Transport class fastfailed the io */
-       DID_TARGET_FAILURE = 0x10, /* Permanent target failure, do not retry on
-                                   * other paths */
-       DID_NEXUS_FAILURE = 0x11,  /* Permanent nexus failure, retry on other
-                                   * paths might yield different results */
-       DID_ALLOC_FAILURE = 0x12,  /* Space allocation on the device failed */
-       DID_MEDIUM_ERROR = 0x13,  /* Medium error */
+       /*
+        * We used to have DID_TARGET_FAILURE, DID_NEXUS_FAILURE,
+        * DID_ALLOC_FAILURE and DID_MEDIUM_ERROR at 0x10 - 0x13. For compat
+        * with userspace apps that parse the host byte for SG IO, we leave
+        * that block of codes unused and start at 0x14 below.
+        */
        DID_TRANSPORT_MARGINAL = 0x14, /* Transport marginal errors */
 };