IB/hfi1: Remove FULL_MGMT_P_KEY from pkey table at link up

FULL_MGMT_P_KEY doesn't get cleared from the pkey table at link bounce
because the link down and link bounce code paths are different when
moving a QSFP cable on a switch. This causes an HFI unit connected to a
switch to try to be initialized to an FM node when the QSFP cable is
moved from a MgmtAllowed=NO port to a MgmtAllowed=YES port and back to a
MgmtAllowed=NO port. Remove FULL_MGMT_P_KEY from pkey table at link up.

Reviewed-by: Dean Luick <dean.luick@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

diff --git a/drivers/infiniband/hw/hfi1/chip.c b/drivers/infiniband/hw/hfi1/chip.c
index c533d44..3487fdf 100644 (file)
--- a/drivers/infiniband/hw/hfi1/chip.c
+++ b/drivers/infiniband/hw/hfi1/chip.c
@@ -1037,7 +1037,7 @@ static void dc_shutdown(struct hfi1_devdata *);
 static void dc_start(struct hfi1_devdata *);
 static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,
                           unsigned int *np);
-static void remove_full_mgmt_pkey(struct hfi1_pportdata *ppd);
+static void clear_full_mgmt_pkey(struct hfi1_pportdata *ppd);
 
 /*
  * Error interrupt table entry.  This is used as input to the interrupt
@@ -6962,8 +6962,6 @@ void handle_link_down(struct work_struct *work)
        }
 
        reset_neighbor_info(ppd);
-       if (ppd->mgmt_allowed)
-               remove_full_mgmt_pkey(ppd);
 
        /* disable the port */
        clear_rcvctrl(ppd->dd, RCV_CTRL_RCV_PORT_ENABLE_SMASK);
@@ -7072,10 +7070,12 @@ static void add_full_mgmt_pkey(struct hfi1_pportdata *ppd)
        (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
 }
 
-static void remove_full_mgmt_pkey(struct hfi1_pportdata *ppd)
+static void clear_full_mgmt_pkey(struct hfi1_pportdata *ppd)
 {
-       ppd->pkeys[2] = 0;
-       (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
+       if (ppd->pkeys[2] != 0) {
+               ppd->pkeys[2] = 0;
+               (void)hfi1_set_ib_cfg(ppd, HFI1_IB_CFG_PKEYS, 0);
+       }
 }
 
 /*
@@ -9168,6 +9168,13 @@ int start_link(struct hfi1_pportdata *ppd)
                return 0;
        }
 
+       /*
+        * FULL_MGMT_P_KEY is cleared from the pkey table, so that the
+        * pkey table can be configured properly if the HFI unit is connected
+        * to switch port with MgmtAllowed=NO
+        */
+       clear_full_mgmt_pkey(ppd);
+
        return set_link_state(ppd, HLS_DN_POLL);
 }