scsi: read host_busy via scsi_host_busy()

No functional change.

Just introduce scsi_host_busy() and replace the direct read of
scsi_host->host_busy with this new API.

Cc: Omar Sandoval <osandov@fb.com>,
Cc: "Martin K. Petersen" <martin.petersen@oracle.com>,
Cc: James Bottomley <james.bottomley@hansenpartnership.com>,
Cc: Christoph Hellwig <hch@lst.de>,
Cc: Don Brace <don.brace@microsemi.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Bart Van Assche <bart.vanassche@wdc.com>

Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 8932ae81a15a..6a014fd15fe9 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -66,7 +66,7 @@ void scsi_eh_wakeup(struct Scsi_Host *shost)
 {
         lockdep_assert_held(shost->host_lock);
 
-        if (atomic_read(&shost->host_busy) == shost->host_failed) {
+        if (scsi_host_busy(shost) == shost->host_failed) {
                 trace_scsi_eh_wakeup(shost);
                 wake_up_process(shost->ehandler);
                 SCSI_LOG_ERROR_RECOVERY(5, shost_printk(KERN_INFO, shost,
@@ -2155,7 +2155,7 @@ int scsi_error_handler(void *data)
                         break;
 
                 if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||
-                    shost->host_failed != atomic_read(&shost->host_busy)) {
+                    shost->host_failed != scsi_host_busy(shost)) {
                         SCSI_LOG_ERROR_RECOVERY(1,
                                 shost_printk(KERN_INFO, shost,
                                              "scsi_eh_%d: sleeping\n",
@@ -2170,7 +2170,7 @@ int scsi_error_handler(void *data)
                                      "scsi_eh_%d: waking up %d/%d/%d\n",
                                      shost->host_no, shost->host_eh_scheduled,
                                      shost->host_failed,
-                                     atomic_read(&shost->host_busy)));
+                                     scsi_host_busy(shost)));
 
                 /*
                  * We have a host that is failing for some reason.  Figure out