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-rw-r--r--drivers/infiniband/hw/cxgb3/iwch_provider.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_provider.c b/drivers/infiniband/hw/cxgb3/iwch_provider.c
index b1b73232f217..bbbe0184e592 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_provider.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_provider.c
@@ -736,6 +736,10 @@ static struct ib_mr *iwch_get_dma_mr(struct ib_pd *pd, int acc)
/*
* T3 only supports 32 bits of size.
*/
+ if (sizeof(phys_addr_t) > 4) {
+ pr_warn_once(MOD "Cannot support dma_mrs on this platform.\n");
+ return ERR_PTR(-ENOTSUPP);
+ }
bl.size = 0xffffffff;
bl.addr = 0;
kva = 0;