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    Subject[PATCH v5 3/7] PCI: rcar: Fix calculating mask for PCIEPAMR register
    Date
    The mask value was calculated incorrectly for PCIEPAMR register if the
    size was less than 128 bytes. Fix this issue by adding a check on size.

    Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
    ---
    drivers/pci/controller/pcie-rcar.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    diff --git a/drivers/pci/controller/pcie-rcar.c b/drivers/pci/controller/pcie-rcar.c
    index 41275f9..90d47b21 100644
    --- a/drivers/pci/controller/pcie-rcar.c
    +++ b/drivers/pci/controller/pcie-rcar.c
    @@ -75,7 +75,10 @@ void rcar_pcie_set_outbound(int win, void __iomem *base,
    * keeps things pretty simple.
    */
    size = resource_size(res);
    - mask = (roundup_pow_of_two(size) / SZ_128) - 1;
    + if (size > 128)
    + mask = (roundup_pow_of_two(size) / SZ_128) - 1;
    + else
    + mask = 0x0;
    rcar_pci_write_reg(base, mask << 7, PCIEPAMR(win));

    if (res->flags & IORESOURCE_IO)
    --
    2.7.4
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