[SCSI] hpsa: use check_signature

Use check_signature to find a signature in the mmio address.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Mike Miller <mike.miller@hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

2 files changed, 2 insertions, 4 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 29684c8142b0..bea04e5d3b51 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -408,6 +408,7 @@ config BLK_DEV_3W_XXXX_RAID
 config SCSI_HPSA
         tristate "HP Smart Array SCSI driver"
         depends on PCI && SCSI
+        select CHECK_SIGNATURE
         help
           This driver supports HP Smart Array Controllers (circa 2009).
           It is a SCSI alternative to the cciss driver, which is a block
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 500e20dd56ec..f49047478c94 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3842,10 +3842,7 @@ static void __devinit hpsa_find_board_params(struct ctlr_info *h)
 
 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
 {
-        if ((readb(&h->cfgtable->Signature[0]) != 'C') ||
-            (readb(&h->cfgtable->Signature[1]) != 'I') ||
-            (readb(&h->cfgtable->Signature[2]) != 'S') ||
-            (readb(&h->cfgtable->Signature[3]) != 'S')) {
+        if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
                 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
                 return false;
         }