diff options
| author | Martin Kepplinger <martink@posteo.de> | 2015-01-25 17:51:35 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-02-03 23:16:18 +0300 |
| commit | 2948c01c2b686f03aa50a3a87323604f7ad39578 (patch) | |
| tree | f7d865c73379ee4ce7fde95007a668af20bcf167 /drivers/media | |
| parent | 17d4d6ae09f7b556eb13d4f708f810a1ef99733e (diff) | |
| download | linux-2948c01c2b686f03aa50a3a87323604f7ad39578.tar.xz | |
[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>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/dvb-frontends/stb0899_algo.c | 5 |
1 files changed, 2 insertions, 3 deletions
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); |