4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mauro Carvalho Chehab <mche...@s-opensource.com>
commit 81742be14b6a90c9fd0ff6eb4218bdf696ad8e46 upstream.
Before this patch, when compiled for arm32, the signal strength
were reported as:
Lock (0x1f) Signal= 4294908.66dBm C/N= 12.79dB
Because of a 32 bit integer overflow. After it, it is properly
reported as:
Lock (0x1f) Signal= -58.64dBm C/N= 12.79dB
Fixes: 0f91c9d6bab9 ("[media] TS2020: Calculate tuner gain correctly")
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/media/dvb-frontends/ts2020.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/media/dvb-frontends/ts2020.c
+++ b/drivers/media/dvb-frontends/ts2020.c
@@ -368,7 +368,7 @@ static int ts2020_read_tuner_gain(struct
gain2 = clamp_t(long, gain2, 0, 13);
v_agc = clamp_t(long, v_agc, 400, 1100);
- *_gain = -(gain1 * 2330 +
+ *_gain = -((__s64)gain1 * 2330 +
gain2 * 3500 +
v_agc * 24 / 10 * 10 +
10000);
@@ -386,7 +386,7 @@ static int ts2020_read_tuner_gain(struct
gain3 = clamp_t(long, gain3, 0, 6);
v_agc = clamp_t(long, v_agc, 600, 1600);
- *_gain = -(gain1 * 2650 +
+ *_gain = -((__s64)gain1 * 2650 +
gain2 * 3380 +
gain3 * 2850 +
v_agc * 176 / 100 * 10 -
