aty: use memory_read_from_buffer()

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/video/aty/radeon_base.c b/drivers/video/aty/radeon_base.c
index 3c0a03f..652273e 100644 (file)
--- a/drivers/video/aty/radeon_base.c
+++ b/drivers/video/aty/radeon_base.c
@@ -2098,15 +2098,7 @@ static void radeon_identify_vram(struct radeonfb_info *rinfo)
 
 static ssize_t radeon_show_one_edid(char *buf, loff_t off, size_t count, const u8 *edid)
 {
-       if (off > EDID_LENGTH)
-               return 0;
-
-       if (off + count > EDID_LENGTH)
-               count = EDID_LENGTH - off;
-
-       memcpy(buf, edid + off, count);
-
-       return count;
+       return memory_read_from_buffer(buf, count, &off, edid, EDID_LENGTH);
 }