pcie-rockchip-ep.c coverity issue #1437163

[Bjorn Helgaas <helgaas@xxxxxxxxxx>]

Hi Shawn,

Please take a look at this issue reported by Coverity:

332 static int rockchip_pcie_ep_get_msi(struct pci_epc *epc, u8 fn)
333 {
334        struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
335        struct rockchip_pcie *rockchip = &ep->rockchip;
336        u16 flags;
337
338        flags = rockchip_pcie_read(rockchip,
339                                   ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
340                                   ROCKCHIP_PCIE_EP_MSI_CTRL_REG);

CID 1437163 (#2 of 2): Operands don't affect result
(CONSTANT_EXPRESSION_RESULT) result_independent_of_operands: flags &
(65536UL /* 1UL << 16 */) is always 0 regardless of the values of its
operands. This occurs as the logical operand of !.

341        if (!(flags & ROCKCHIP_PCIE_EP_MSI_CTRL_ME))
342                return -EINVAL;