[SCSI] hpsa: enable unit attention reporting

This used to be the default, but at some point the firmware guys
changed the default and I failed to notice.  Now to get unit
attention notifications, you must twiddle a bit indicating you
want them.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

2 files changed, 5 insertions, 3 deletions

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 25afeb4c4a62..b146cafc50b1 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4384,14 +4384,15 @@ static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
 
 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 5158709c00f6..bfc8c4ea66f8 100644
--- a/drivers/scsi/hpsa_cmd.h
+++ b/drivers/scsi/hpsa_cmd.h
@@ -358,6 +358,7 @@ struct CfgTable {
         u32           HeartBeat;
         u32           driver_support;
 #define                 ENABLE_SCSI_PREFETCH 0x100
+#define                 ENABLE_UNIT_ATTN 0x01
         u32             MaxScatterGatherElements;
         u32             MaxLogicalUnits;
         u32             MaxPhysicalDevices;