[SCSI] mpt2sas: Use of get_free_pages for huge memorary allocation.

use the get_free_pages API for larger contigious physical memory chunk.
Also, the ioc->chain_depth need to be changed from
a 16bit to 32bit variable because the number of chains will exceed 64k
when the queue depth is large.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index 142b694c9de5..cdedfcbb8ca7 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -676,7 +676,8 @@ struct MPT2SAS_ADAPTER {
         dma_addr_t      request_dma;
         u32             request_dma_sz;
         struct request_tracker *scsi_lookup;
-        spinlock_t scsi_lookup_lock;
+        ulong           scsi_lookup_pages;
+        spinlock_t      scsi_lookup_lock;
         struct list_head free_list;
         int             pending_io_count;
         wait_queue_head_t reset_wq;
@@ -688,7 +689,7 @@ struct MPT2SAS_ADAPTER {
         u16             max_sges_in_chain_message;
         u16             chains_needed_per_io;
         u16             chain_offset_value_for_main_message;
-        u16             chain_depth;
+        u32             chain_depth;
 
         /* hi-priority queue */
         u16             hi_priority_smid;