[PATCH] PCI: Mediatek: Use resource_size function on resource object

[honghui.zhang]

From: Honghui Zhang <honghui.zh...@mediatek.com>

drivers/pci/pcie-mediatek.c:720:13-16: WARNING: Suspicious code. resource_size 
is maybe missing with mem

Generated by: scripts/coccinelle/api/resource_size.cocci

Signed-off-by: Honghui Zhang <honghui.zh...@mediatek.com>
---
 drivers/pci/controller/pcie-mediatek.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/pci/controller/pcie-mediatek.c 
b/drivers/pci/controller/pcie-mediatek.c
index e307166..0168376 100644
--- a/drivers/pci/controller/pcie-mediatek.c
+++ b/drivers/pci/controller/pcie-mediatek.c
@@ -654,7 +654,6 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port 
*port)
        struct resource *mem = &pcie->mem;
        const struct mtk_pcie_soc *soc = port->pcie->soc;
        u32 val;
-       size_t size;
        int err;
 
        /* MT7622 platforms need to enable LTSSM and ASPM from PCIe subsys */
@@ -706,8 +705,7 @@ static int mtk_pcie_startup_port_v2(struct mtk_pcie_port 
*port)
                mtk_pcie_enable_msi(port);
 
        /* Set AHB to PCIe translation windows */
-       size = mem->end - mem->start;
-       val = lower_32_bits(mem->start) | AHB2PCIE_SIZE(fls(size));
+       val = lower_32_bits(mem->start) | 
AHB2PCIE_SIZE(fls(resource_size(mem)));
        writel(val, port->base + PCIE_AHB_TRANS_BASE0_L);
 
        val = upper_32_bits(mem->start);
-- 
2.6.4