[SCSI] handle scsi_add_host failure for aic79xx and fix compiler warning

Add scsi_add_host() failure handling for aic79xx
Also silence a compiler warning :
 drivers/scsi/aic7xxx/aic79xx_osm.c: In function `ahd_linux_register_host':
 drivers/scsi/aic7xxx/aic79xx_osm.c:1099: warning: ignoring return value of `scsi_add_host', declared with attribute warn_unused_result

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 9 insertions, 2 deletions

diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index 6aab9dacdeea..1c8f872e2dd4 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -1064,6 +1064,7 @@ ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *templa
         struct  Scsi_Host *host;
         char    *new_name;
         u_long  s;
+        int     retval;
 
         template->name = ahd->description;
         host = scsi_host_alloc(template, sizeof(struct ahd_softc *));
@@ -1096,9 +1097,15 @@ ahd_linux_register_host(struct ahd_softc *ahd, struct scsi_host_template *templa
 
         host->transportt = ahd_linux_transport_template;
 
-        scsi_add_host(host, &ahd->dev_softc->dev); /* XXX handle failure */
+        retval = scsi_add_host(host, &ahd->dev_softc->dev);
+        if (retval) {
+                printk(KERN_WARNING "aic79xx: scsi_add_host failed\n");
+                scsi_host_put(host);
+                return retval;
+        }
+
         scsi_scan_host(host);
-        return (0);
+        return 0;
 }
 
 uint64_t