IB/hfi1: Check for error on call to alloc_rsm_map_table

The call to alloc_rsm_map_table does not check if the kmalloc fails.
Check for a NULL on alloc, and bail if it fails.

Fixes: 372cc85a13c9 ("IB/hfi1: Extract RSM map table init from QOS")
Link: https://lore.kernel.org/r/20190715164521.74174.27047.stgit@awfm-01.aw.intel.com
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: John Fleck <john.fleck@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index d5b643a..67052dc 100644 (file)
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -14452,7 +14452,7 @@ void hfi1_deinit_vnic_rsm(struct hfi1_devdata *dd)
                clear_rcvctrl(dd, RCV_CTRL_RCV_RSM_ENABLE_SMASK);
 }
 
-static void init_rxe(struct hfi1_devdata *dd)
+static int init_rxe(struct hfi1_devdata *dd)
 {
        struct rsm_map_table *rmt;
        u64 val;
@@ -14461,6 +14461,9 @@ static void init_rxe(struct hfi1_devdata *dd)
        write_csr(dd, RCV_ERR_MASK, ~0ull);
 
        rmt = alloc_rsm_map_table(dd);
+       if (!rmt)
+               return -ENOMEM;
+
        /* set up QOS, including the QPN map table */
        init_qos(dd, rmt);
        init_fecn_handling(dd, rmt);
@@ -14487,6 +14490,7 @@ static void init_rxe(struct hfi1_devdata *dd)
        val |= ((4ull & RCV_BYPASS_HDR_SIZE_MASK) <<
                RCV_BYPASS_HDR_SIZE_SHIFT);
        write_csr(dd, RCV_BYPASS, val);
+       return 0;
 }
 
 static void init_other(struct hfi1_devdata *dd)
@@ -15024,7 +15028,10 @@ int hfi1_init_dd(struct hfi1_devdata *dd)
                goto bail_cleanup;
 
        /* set initial RXE CSRs */
-       init_rxe(dd);
+       ret = init_rxe(dd);
+       if (ret)
+               goto bail_cleanup;
+
        /* set initial TXE CSRs */
        init_txe(dd);
        /* set initial non-RXE, non-TXE CSRs */