udc: lpc32xx: fix 64-bit compiler warning

gcc points out a suspicious cast from a pointer to an 'int' when
compile-testing on 64-bit architectures.

drivers/usb/gadget/udc/lpc32xx_udc.c: In function ‘udc_pop_fifo’:
drivers/usb/gadget/udc/lpc32xx_udc.c:1156:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
drivers/usb/gadget/udc/lpc32xx_udc.c: In function ‘udc_stuff_fifo’:
drivers/usb/gadget/udc/lpc32xx_udc.c:1257:11: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]

The code works find, but it's easy enough to change the cast to
a uintptr_t to shut up that warning.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20190918200201.2292008-1-arnd@arndb.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/udc/Kconfig b/drivers/usb/gadget/udc/Kconfig
index d7e6116..d354036 100644 (file)
--- a/drivers/usb/gadget/udc/Kconfig
+++ b/drivers/usb/gadget/udc/Kconfig
@@ -45,7 +45,7 @@ config USB_AT91
 
 config USB_LPC32XX
        tristate "LPC32XX USB Peripheral Controller"
-       depends on ARCH_LPC32XX
+       depends on ARCH_LPC32XX || COMPILE_TEST
        depends on I2C
        select USB_ISP1301
        help

diff --git a/drivers/usb/gadget/udc/lpc32xx_udc.c b/drivers/usb/gadget/udc/lpc32xx_udc.c
index b3e073f..2b1f3cc 100644 (file)
--- a/drivers/usb/gadget/udc/lpc32xx_udc.c
+++ b/drivers/usb/gadget/udc/lpc32xx_udc.c
@@ -1151,7 +1151,7 @@ static void udc_pop_fifo(struct lpc32xx_udc *udc, u8 *data, u32 bytes)
        u32 *p32, tmp, cbytes;
 
        /* Use optimal data transfer method based on source address and size */
-       switch (((u32) data) & 0x3) {
+       switch (((uintptr_t) data) & 0x3) {
        case 0: /* 32-bit aligned */
                p32 = (u32 *) data;
                cbytes = (bytes & ~0x3);
@@ -1252,7 +1252,7 @@ static void udc_stuff_fifo(struct lpc32xx_udc *udc, u8 *data, u32 bytes)
        u32 *p32, tmp, cbytes;
 
        /* Use optimal data transfer method based on source address and size */
-       switch (((u32) data) & 0x3) {
+       switch (((uintptr_t) data) & 0x3) {
        case 0: /* 32-bit aligned */
                p32 = (u32 *) data;
                cbytes = (bytes & ~0x3);