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    Subject[PATCH] pci: Skip id checking if no id is passed

    Will get warning when pci stub driver is built-in kenel like:
    pci-stub: invalid id string ""

    So stop early if no id is passed.

    Signed-off-by: Yinghai Lu <yinghai@kernel.org>

    ---
    drivers/pci/pci-stub.c | 4 ++++
    1 file changed, 4 insertions(+)

    Index: linux-2.6/drivers/pci/pci-stub.c
    ===================================================================
    --- linux-2.6.orig/drivers/pci/pci-stub.c
    +++ linux-2.6/drivers/pci/pci-stub.c
    @@ -47,6 +47,10 @@ static int __init pci_stub_init(void)
    if (rc)
    return rc;

    + /* no ids passed actually */
    + if (ids[0] == '\0')
    + return 0;
    +
    /* add ids specified in the module parameter */
    p = ids;
    while ((id = strsep(&p, ","))) {

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