diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 25afeb4..b146caf 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4384,14 +4384,15 @@
 
 static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
 {
-#ifdef CONFIG_X86
-	/* Need to enable prefetch in the SCSI core for 6400 in x86 */
 	u32 driver_support;
 
+#ifdef CONFIG_X86
+	/* Need to enable prefetch in the SCSI core for 6400 in x86 */
 	driver_support = readl(&(h->cfgtable->driver_support));
 	driver_support |= ENABLE_SCSI_PREFETCH;
-	writel(driver_support, &(h->cfgtable->driver_support));
 #endif
+	driver_support |= ENABLE_UNIT_ATTN;
+	writel(driver_support, &(h->cfgtable->driver_support));
 }
 
 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
diff --git a/drivers/scsi/hpsa_cmd.h b/drivers/scsi/hpsa_cmd.h
index 5158709..bfc8c4e 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -358,6 +358,7 @@
 	u32           HeartBeat;
 	u32           driver_support;
 #define			ENABLE_SCSI_PREFETCH 0x100
+#define			ENABLE_UNIT_ATTN 0x01
 	u32	 	MaxScatterGatherElements;
 	u32		MaxLogicalUnits;
 	u32		MaxPhysicalDevices;