From: Stephen M. Cameron <scameron@xxxxxxxxxxxxxxxxxx>
hpsa: check that simple mode is supported
before trying to enter simple mode transport method.
Signed-off-by: Stephen M. Cameron <scameron@xxxxxxxxxxxxxxxxxx>
---
drivers/scsi/hpsa.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index bb1b86e..61fd71e 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -3421,6 +3421,11 @@ static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
static int __devinit hpsa_enter_simple_mode(struct ctlr_info *h)
{
int i;
+ u32 trans_support;
+
+ trans_support = readl(&(h->cfgtable->TransportSupport));
+ if (!(trans_support & SIMPLE_MODE))
+ return -ENOTSUPP;
h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
/* Update the field, and then ring the doorbell */
--
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