From: Martin Kepplinger <martink@posteo.de>
Date: Sun, 25 Jan 2015 14:51:35 +0000 (-0300)
Subject: [media] stb0899: use sign_extend32() for sign extension
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=2948c01c2b686f03aa50a3a87323604f7ad39578;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[media] stb0899: use sign_extend32() for sign extension

Instead of implement its own logic, use the already-defined one.

Signed-off-by: Martin Kepplinger <martink@posteo.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
---

diff --git a/drivers/media/dvb-frontends/stb0899_algo.c b/drivers/media/dvb-frontends/stb0899_algo.c
index 93596e0e640b..3012f196e9bd 100644
--- a/drivers/media/dvb-frontends/stb0899_algo.c
+++ b/drivers/media/dvb-frontends/stb0899_algo.c
@@ -19,6 +19,7 @@
 	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
+#include <linux/bitops.h>
 #include "stb0899_drv.h"
 #include "stb0899_priv.h"
 #include "stb0899_reg.h"
@@ -1490,9 +1491,7 @@ enum stb0899_status stb0899_dvbs2_algo(struct stb0899_state *state)
 		/* Store signal parameters	*/
 		offsetfreq = STB0899_READ_S2REG(STB0899_S2DEMOD, CRL_FREQ);
 
-		/* sign extend 30 bit value before using it in calculations */
-		if (offsetfreq & (1 << 29))
-			offsetfreq |= -1 << 30;
+		offsetfreq = sign_extend32(offsetfreq, 29);
 
 		offsetfreq = offsetfreq / ((1 << 30) / 1000);
 		offsetfreq *= (internal->master_clk / 1000000);