[PATCH 1/5] PCI: dwc: Make use of IS_ALIGNED()

[Andrey Smirnov]

Make the intent a bit more clear as well as get rid of explicit
arithmetic by using IS_ALIGNED() to determine if "addr" is aligned to
"size". No functional change intended.

Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx>
Acked-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Cc: Fabio Estevam <fabio.estevam@xxxxxxx>
Cc: Chris Healy <cphealy@xxxxxxxxx>
Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Cc: Leonard Crestez <leonard.crestez@xxxxxxx>
Cc: "A.s. Dong" <aisheng.dong@xxxxxxx>
Cc: Richard Zhu <hongxing.zhu@xxxxxxx>
Cc: linux-imx@xxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: linux-pci@xxxxxxxxxxxxxxx
---
 drivers/pci/controller/dwc/pcie-designware.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c
index 93ef8c31fb39..67236379c61a 100644
--- a/drivers/pci/controller/dwc/pcie-designware.c
+++ b/drivers/pci/controller/dwc/pcie-designware.c
@@ -22,7 +22,7 @@
 
 int dw_pcie_read(void __iomem *addr, int size, u32 *val)
 {
-	if ((uintptr_t)addr & (size - 1)) {
+	if (!IS_ALIGNED((uintptr_t)addr, size)) {
 		*val = 0;
 		return PCIBIOS_BAD_REGISTER_NUMBER;
 	}
@@ -43,7 +43,7 @@ int dw_pcie_read(void __iomem *addr, int size, u32 *val)
 
 int dw_pcie_write(void __iomem *addr, int size, u32 val)
 {
-	if ((uintptr_t)addr & (size - 1))
+	if (!IS_ALIGNED((uintptr_t)addr, size))
 		return PCIBIOS_BAD_REGISTER_NUMBER;
 
 	if (size == 4)
-- 
2.20.1