[PATCH net-next 1/4] mlxsw: pci: Set mbox dma addresses to zero when not used

[Ido Schimmel]

From: Shalom Toledo <shal...@mellanox.com>

Some of the opcodes don't use in, out or both mboxes. In such cases, the
mbox address is a reserved field and FW expects it to be zero.

Signed-off-by: Shalom Toledo <shal...@mellanox.com>
Signed-off-by: Jiri Pirko <j...@mellanox.com>
Signed-off-by: Ido Schimmel <ido...@mellanox.com>
---
 drivers/net/ethernet/mellanox/mlxsw/pci.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c 
b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index 85faa87bf42d..e30c6ce3dcb4 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -1519,8 +1519,7 @@ static int mlxsw_pci_cmd_exec(void *bus_priv, u16 opcode, 
u8 opcode_mod,
                              u8 *p_status)
 {
        struct mlxsw_pci *mlxsw_pci = bus_priv;
-       dma_addr_t in_mapaddr = mlxsw_pci->cmd.in_mbox.mapaddr;
-       dma_addr_t out_mapaddr = mlxsw_pci->cmd.out_mbox.mapaddr;
+       dma_addr_t in_mapaddr = 0, out_mapaddr = 0;
        bool evreq = mlxsw_pci->cmd.nopoll;
        unsigned long timeout = msecs_to_jiffies(MLXSW_PCI_CIR_TIMEOUT_MSECS);
        bool *p_wait_done = &mlxsw_pci->cmd.wait_done;
@@ -1532,11 +1531,15 @@ static int mlxsw_pci_cmd_exec(void *bus_priv, u16 
opcode, u8 opcode_mod,
        if (err)
                return err;
 
-       if (in_mbox)
+       if (in_mbox) {
                memcpy(mlxsw_pci->cmd.in_mbox.buf, in_mbox, in_mbox_size);
+               in_mapaddr = mlxsw_pci->cmd.in_mbox.mapaddr;
+       }
        mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_HI, 
upper_32_bits(in_mapaddr));
        mlxsw_pci_write32(mlxsw_pci, CIR_IN_PARAM_LO, 
lower_32_bits(in_mapaddr));
 
+       if (out_mbox)
+               out_mapaddr = mlxsw_pci->cmd.out_mbox.mapaddr;
        mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_HI, 
upper_32_bits(out_mapaddr));
        mlxsw_pci_write32(mlxsw_pci, CIR_OUT_PARAM_LO, 
lower_32_bits(out_mapaddr));
 
-- 
2.14.3