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Message-Id: <1422195725-23577-1-git-send-email-martink@posteo.de> Date: Sun, 25 Jan 2015 15:22:05 +0100 From: Martin Kepplinger <martink@...teo.de> To: mchehab@....samsung.com Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, Martin Kepplinger <martink@...teo.de> Subject: [PATCH] media: (stb0899) use sign_extend32() for sign extension Signed-off-by: Martin Kepplinger <martink@...teo.de> --- drivers/media/dvb-frontends/stb0899_algo.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/media/dvb-frontends/stb0899_algo.c b/drivers/media/dvb-frontends/stb0899_algo.c index 93596e0..7bbcfde 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(offset_freq, 29); offsetfreq = offsetfreq / ((1 << 30) / 1000); offsetfreq *= (internal->master_clk / 1000000); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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