[PATCH 4.4 58/73] mfd: omap-usb-tll: Fix register offsets

From: Greg Kroah-Hartman
Date: Mon Jul 08 2019 - 11:49:01 EST

[ Upstream commit 993dc737c0996c163325961fb62a0ed9fd0308b4 ]

gcc-8 notices that the register number calculation is wrong
when the offset is an 'u8' but the number is larger than 256:

drivers/mfd/omap-usb-tll.c: In function 'omap_tll_init':
drivers/mfd/omap-usb-tll.c:90:46: error: overflow in conversion from 'int' to 'u8 {aka unsigned char}' chages value from 'i * 256 + 2070' to '22' [-Werror=overflow]

This addresses it by always using a 32-bit offset number for
the register. This is apparently an old problem that previous
compilers did not find.

Fixes: 16fa3dc75c22 ("mfd: omap-usb-tll: HOST TLL platform driver")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/mfd/omap-usb-tll.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c
index fe51e9709210..1093d8ad232b 100644
--- a/drivers/mfd/omap-usb-tll.c
+++ b/drivers/mfd/omap-usb-tll.c
@@ -129,12 +129,12 @@ static inline u32 usbtll_read(void __iomem *base, u32 reg)
return readl_relaxed(base + reg);

-static inline void usbtll_writeb(void __iomem *base, u8 reg, u8 val)
+static inline void usbtll_writeb(void __iomem *base, u32 reg, u8 val)
writeb_relaxed(val, base + reg);

-static inline u8 usbtll_readb(void __iomem *base, u8 reg)
+static inline u8 usbtll_readb(void __iomem *base, u32 reg)
return readb_relaxed(base + reg);