fbdev: viafb: use new array-copying-wrapper

viafbdev.c utilizes memdup_user() to copy an array from userspace.

There is a new wrapper, specifically designed for copying arrays. Use
this one instead.

Suggested-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/drivers/video/fbdev/via/viafbdev.c b/drivers/video/fbdev/via/viafbdev.c
index 58868f8880d655b771755002ee1804655078609c..a52b1ba43a48744a5e7609080a48609ea8a3cd1a 100644 (file)
--- a/drivers/video/fbdev/via/viafbdev.c
+++ b/drivers/video/fbdev/via/viafbdev.c
@@ -574,7 +574,7 @@ static int viafb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
                break;
 
        case VIAFB_SET_GAMMA_LUT:
-               viafb_gamma_table = memdup_user(argp, 256 * sizeof(u32));
+               viafb_gamma_table = memdup_array_user(argp, 256, sizeof(u32));
                if (IS_ERR(viafb_gamma_table))
                        return PTR_ERR(viafb_gamma_table);
                viafb_set_gamma_table(viafb_bpp, viafb_gamma_table);