[PATCH] drm/mgag200: Fix type of dividend in do_div()

[Thierry Reding]

From: Thierry Reding <tred...@nvidia.com>

The semantics of do_div() are (see include/asm-generic/do_div.h):

        uint32_t do_div(uint64_t *n, uint32_t base)

Using a different type will therefore cause the following warning (as
seen on xtensa/allmodconfig):

          CC [M]  drivers/gpu/drm/mgag200/mgag200_mode.o
        In file included from arch/xtensa/include/generated/asm/div64.h:1:0,
                         from include/linux/kernel.h:124,
                         from include/linux/delay.h:10,
                         from drivers/gpu/drm/mgag200/mgag200_mode.c:14:
        drivers/gpu/drm/mgag200/mgag200_mode.c: In function 
'mga_vga_calculate_mode_bandwidth':
        include/asm-generic/div64.h:43:28: warning: comparison of distinct 
pointer types lacks a cast
          (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
                                    ^
        drivers/gpu/drm/mgag200/mgag200_mode.c:1471:2: note: in expansion of 
macro 'do_div'
          do_div(pixels_per_second, total_area);
          ^
        include/asm-generic/div64.h:43:28: warning: comparison of distinct 
pointer types lacks a cast
          (void)(((typeof((n)) *)0) == ((uint64_t *)0)); \
                                    ^
        drivers/gpu/drm/mgag200/mgag200_mode.c:1474:2: note: in expansion of 
macro 'do_div'
          do_div(bandwidth, divisor);
          ^

Signed-off-by: Thierry Reding <treding at nvidia.com>
---
 drivers/gpu/drm/mgag200/mgag200_mode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/mgag200/mgag200_mode.c 
b/drivers/gpu/drm/mgag200/mgag200_mode.c
index 83485ab81ce8..4d519dc99db8 100644
--- a/drivers/gpu/drm/mgag200/mgag200_mode.c
+++ b/drivers/gpu/drm/mgag200/mgag200_mode.c
@@ -1455,9 +1455,9 @@ static int mga_vga_get_modes(struct drm_connector 
*connector)
 static uint32_t mga_vga_calculate_mode_bandwidth(struct drm_display_mode *mode,
                                                        int bits_per_pixel)
 {
-       uint32_t total_area, divisor;
-       int64_t active_area, pixels_per_second, bandwidth;
        uint64_t bytes_per_pixel = (bits_per_pixel + 7) / 8;
+       uint32_t total_area, divisor, active_area;
+       uint64_t pixels_per_second, bandwidth;

        divisor = 1024;

-- 
2.1.0