[SCSI] fnic: fix incorrect use of SLAB_CACHE_DMA flag

Driver was incorrectly using the SLAB_CACHE_DMA flag when creating a cache
for SGLs. fnic device does not have 24-bit DMA restrictions. Remove the flag
and allocations from ZONE_DMA.

Thanks to Roland Dreier and David Rientjes for pointing out the bug.

Signed-off-by: Abhijeet Joglekar <abjoglek@cisco.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/fnic/fnic_scsi.c b/drivers/scsi/fnic/fnic_scsi.c
index 538b31c..c40ce52 100644
--- a/drivers/scsi/fnic/fnic_scsi.c
+++ b/drivers/scsi/fnic/fnic_scsi.c
@@ -406,7 +406,7 @@
 	if (sg_count) {
 		io_req->sgl_list =
 			mempool_alloc(fnic->io_sgl_pool[io_req->sgl_type],
-				      GFP_ATOMIC | GFP_DMA);
+				      GFP_ATOMIC);
 		if (!io_req->sgl_list) {
 			ret = SCSI_MLQUEUE_HOST_BUSY;
 			scsi_dma_unmap(sc);