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    Subject[PATCH 2/4] drivers/scsi/fcoe/fcoe.c: add missing test
    Date
    From: Julia Lawall <julia@diku.dk>

    The initializations of both fcoe_nport_scsi_transport and
    fcoe_vport_scsi_transport can fail, so test both of them.

    The semantic match that finds this problem is as follows:
    (http://coccinelle.lip6.fr/)

    // <smpl>
    @r@
    identifier x,y,f!={PTR_ERR,ERR_PTR,ERR_CAST};
    statement S;
    @@

    x = f(...);
    (
    if (\(x == NULL\|IS_ERR(x)\)) S
    |
    *if (\(y == NULL\|IS_ERR(y)\))
    { ... when != x
    return ...; }
    )
    // </smpl>

    Signed-off-by: Julia Lawall <julia@diku.dk>

    ---
    drivers/scsi/fcoe/fcoe.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
    index ba710e3..921b636 100644
    --- a/drivers/scsi/fcoe/fcoe.c
    +++ b/drivers/scsi/fcoe/fcoe.c
    @@ -1096,7 +1096,7 @@ static int __init fcoe_if_init(void)
    fcoe_vport_scsi_transport =
    fc_attach_transport(&fcoe_vport_fc_functions);

    - if (!fcoe_nport_scsi_transport) {
    + if (!fcoe_nport_scsi_transport || !fcoe_vport_scsi_transport) {
    printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
    return -ENODEV;
    }


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