From: Michael Krufky <mkrufky@kernellabs.com>
Date: Thu, 28 May 2009 16:50:36 +0000 (-0300)
Subject: V4L/DVB (11877): lgdt3305: fix 64bit division in function lgdt3305_set_if
X-Git-Tag: firefly_0821_release~13887^2~49
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=511da457340d3b30336f7a6731bad9bbe3ffaf08;p=firefly-linux-kernel-4.4.55.git

V4L/DVB (11877): lgdt3305: fix 64bit division in function lgdt3305_set_if

Signed-off-by: Michael Krufky <kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
---

diff --git a/drivers/media/dvb/frontends/lgdt3305.c b/drivers/media/dvb/frontends/lgdt3305.c
index d92d0557a80b..fde8c59700fb 100644
--- a/drivers/media/dvb/frontends/lgdt3305.c
+++ b/drivers/media/dvb/frontends/lgdt3305.c
@@ -19,6 +19,7 @@
  *
  */
 
+#include <asm/div64.h>
 #include <linux/dvb/frontend.h>
 #include "dvb_math.h"
 #include "lgdt3305.h"
@@ -496,27 +497,15 @@ static int lgdt3305_set_if(struct lgdt3305_state *state,
 
 	nco = if_freq_khz / 10;
 
-#define LGDT3305_64BIT_DIVISION_ENABLED 0
-	/* FIXME: 64bit division disabled to avoid linking error:
-	 * WARNING: "__udivdi3" [lgdt3305.ko] undefined!
-	 */
 	switch (param->u.vsb.modulation) {
 	case VSB_8:
-#if LGDT3305_64BIT_DIVISION_ENABLED
 		nco <<= 24;
-		nco /= 625;
-#else
-		nco *= ((1 << 24) / 625);
-#endif
+		do_div(nco, 625);
 		break;
 	case QAM_64:
 	case QAM_256:
-#if LGDT3305_64BIT_DIVISION_ENABLED
 		nco <<= 28;
-		nco /= 625;
-#else
-		nco *= ((1 << 28) / 625);
-#endif
+		do_div(nco, 625);
 		break;
 	default:
 		return -EINVAL;