[SCSI] handle scsi_add_host failure for aic7xxx and fix compiler warning

Add scsi_add_host() failure handling for aic7xxx
Also silence a compiler warning :
 drivers/scsi/aic7xxx/aic7xxx_osm.c: In function `ahc_linux_register_host':
 drivers/scsi/aic7xxx/aic7xxx_osm.c:1100: 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>

diff --git a/drivers/scsi/aic7xxx/aic7xxx_osm.c b/drivers/scsi/aic7xxx/aic7xxx_osm.c
index d866213..fd389e9 100644 (file)
--- a/drivers/scsi/aic7xxx/aic7xxx_osm.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_osm.c
@@ -1061,10 +1061,11 @@ uint32_t aic7xxx_verbose;
 int
 ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *template)
 {
-       char     buf[80];
-       struct   Scsi_Host *host;
+       char    buf[80];
+       struct  Scsi_Host *host;
        char    *new_name;
-       u_long   s;
+       u_long  s;
+       int     retval;
 
        template->name = ahc->description;
        host = scsi_host_alloc(template, sizeof(struct ahc_softc *));
@@ -1097,9 +1098,16 @@ ahc_linux_register_host(struct ahc_softc *ahc, struct scsi_host_template *templa
 
        host->transportt = ahc_linux_transport_template;
 
-       scsi_add_host(host, (ahc->dev_softc ? &ahc->dev_softc->dev : NULL)); /* XXX handle failure */
+       retval = scsi_add_host(host,
+                       (ahc->dev_softc ? &ahc->dev_softc->dev : NULL));
+       if (retval) {
+               printk(KERN_WARNING "aic7xxx: scsi_add_host failed\n");
+               scsi_host_put(host);
+               return retval;
+       }
+
        scsi_scan_host(host);
-       return (0);
+       return 0;
 }
 
 /*