linux-kernel - [PATCH v3 2/4] scsi: devinfo: add new flag BLIST_MEDIA

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Date:   Sun, 28 Mar 2021 12:25:29 +0200
From:   Martin Kepplinger <martin.kepplinger@...i.sm>
To:     martin.kepplinger@...i.sm
Cc:     bvanassche@....org, jejb@...ux.ibm.com,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-pm@...r.kernel.org, martin.petersen@...cle.com,
        stern@...land.harvard.edu
Subject: [PATCH v3 2/4] scsi: devinfo: add new flag BLIST_MEDIA_CHANGE

add a new flag for devices that issue MEDIA CHANGE unit attentions
when actually no medium changed. Drivers can for example set the
expecting_media_change device flag in order to ignore the next
following MEDIA CHANGE unit attention.

Signed-off-by: Martin Kepplinger <martin.kepplinger@...i.sm>
---
 include/scsi/scsi_devinfo.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h
index 3fdb322d4c4b..dee9dce14887 100644
--- a/include/scsi/scsi_devinfo.h
+++ b/include/scsi/scsi_devinfo.h
@@ -28,7 +28,8 @@
 #define BLIST_LARGELUN		((__force blist_flags_t)(1ULL << 9))
 /* override additional length field */
 #define BLIST_INQUIRY_36	((__force blist_flags_t)(1ULL << 10))
-#define __BLIST_UNUSED_11	((__force blist_flags_t)(1ULL << 11))
+/* Ignore the next media change event */
+#define BLIST_MEDIA_CHANGE	((__force blist_flags_t)(1ULL << 11))
 /* do not do automatic start on add */
 #define BLIST_NOSTARTONADD	((__force blist_flags_t)(1ULL << 12))
 #define __BLIST_UNUSED_13	((__force blist_flags_t)(1ULL << 13))
@@ -73,8 +74,7 @@
 #define __BLIST_HIGH_UNUSED (~(__BLIST_LAST_USED | \
 			       (__force blist_flags_t) \
 			       ((__force __u64)__BLIST_LAST_USED - 1ULL)))
-#define __BLIST_UNUSED_MASK (__BLIST_UNUSED_11 | \
-			     __BLIST_UNUSED_13 | \
+#define __BLIST_UNUSED_MASK (__BLIST_UNUSED_13 | \
 			     __BLIST_UNUSED_14 | \
 			     __BLIST_UNUSED_15 | \
 			     __BLIST_UNUSED_16 | \
-- 
2.30.2