scsi: rescan VPD attributes

The VPD page information might change, so we need to be able to update
it. This patch implements a VPD page rescan whenever the 'rescan' sysfs
attribute is triggered.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Shane Seymour <shane.seymour@hpe.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index fe89d7cd67b9..bde4077f2864 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -109,6 +109,7 @@ struct scsi_device {
         char type;
         char scsi_level;
         char inq_periph_qual;   /* PQ from INQUIRY data */      
+        struct mutex inquiry_mutex;
         unsigned char inquiry_len;      /* valid bytes in 'inquiry' */
         unsigned char * inquiry;        /* INQUIRY response data */
         const char * vendor;            /* [back_compat] point into 'inquiry' ... */
@@ -117,9 +118,9 @@ struct scsi_device {
 
 #define SCSI_VPD_PG_LEN                255
         int vpd_pg83_len;
-        unsigned char *vpd_pg83;
+        unsigned char __rcu *vpd_pg83;
         int vpd_pg80_len;
-        unsigned char *vpd_pg80;
+        unsigned char __rcu *vpd_pg80;
         unsigned char current_tag;      /* current tag */
         struct scsi_target      *sdev_target;   /* used only for single_lun */