sfc: Change falcon_probe_board() to fail for unsupported boards

The driver needs specific PHY and board support code for each SFC4000
board; there is no point trying to continue if it is missing.
Currently unsupported boards can trigger an 'oops'.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Cc: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index d294d66..08278e7 100644 (file)
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -1320,7 +1320,9 @@ static int falcon_probe_nvconfig(struct efx_nic *efx)
 
        EFX_LOG(efx, "PHY is %d phy_id %d\n", efx->phy_type, efx->mdio.prtad);
 
-       falcon_probe_board(efx, board_rev);
+       rc = falcon_probe_board(efx, board_rev);
+       if (rc)
+               goto fail2;
 
        kfree(nvconfig);
        return 0;

diff --git a/drivers/net/sfc/falcon_boards.c b/drivers/net/sfc/falcon_boards.c
index 5712fdd..c7a933a 100644 (file)
--- a/drivers/net/sfc/falcon_boards.c
+++ b/drivers/net/sfc/falcon_boards.c
@@ -728,15 +728,7 @@ static const struct falcon_board_type board_types[] = {
        },
 };
 
-static const struct falcon_board_type falcon_dummy_board = {
-       .init           = efx_port_dummy_op_int,
-       .init_phy       = efx_port_dummy_op_void,
-       .fini           = efx_port_dummy_op_void,
-       .set_id_led     = efx_port_dummy_op_set_id_led,
-       .monitor        = efx_port_dummy_op_int,
-};
-
-void falcon_probe_board(struct efx_nic *efx, u16 revision_info)
+int falcon_probe_board(struct efx_nic *efx, u16 revision_info)
 {
        struct falcon_board *board = falcon_board(efx);
        u8 type_id = FALCON_BOARD_TYPE(revision_info);
@@ -754,8 +746,9 @@ void falcon_probe_board(struct efx_nic *efx, u16 revision_info)
                         (efx->pci_dev->subsystem_vendor == EFX_VENDID_SFC)
                         ? board->type->ref_model : board->type->gen_type,
                         'A' + board->major, board->minor);
+               return 0;
        } else {
                EFX_ERR(efx, "unknown board type %d\n", type_id);
-               board->type = &falcon_dummy_board;
+               return -ENODEV;
        }
 }

diff --git a/drivers/net/sfc/nic.h b/drivers/net/sfc/nic.h
index 9351c03..3166baf 100644 (file)
--- a/drivers/net/sfc/nic.h
+++ b/drivers/net/sfc/nic.h
@@ -156,7 +156,7 @@ extern struct efx_nic_type siena_a0_nic_type;
  **************************************************************************
  */
 
-extern void falcon_probe_board(struct efx_nic *efx, u16 revision_info);
+extern int falcon_probe_board(struct efx_nic *efx, u16 revision_info);
 
 /* TX data path */
 extern int efx_nic_probe_tx(struct efx_tx_queue *tx_queue);