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Subject: media: dvb-frontends: ves1820: use 64-bit arithmetic instead of 32-bit
Author: Gustavo A. R. Silva <gust...@embeddedor.com>
Date: Tue Feb 6 11:47:09 2018 -0500
Add suffix ULL to constant 10 in order to give the compiler complete
information about the proper arithmetic to use. Notice that this
constant is used in a context that expects an expression of type
u64 (64 bits, unsigned).
The expression fpxin = state->config->xin * 10 is currently being
evaluated using 32-bit arithmetic.
Addresses-Coverity-ID: 200604 ("Unintentional integer overflow")
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
drivers/media/dvb-frontends/ves1820.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/drivers/media/dvb-frontends/ves1820.c
b/drivers/media/dvb-frontends/ves1820.c
index 1d8979289915..17600989f121 100644
--- a/drivers/media/dvb-frontends/ves1820.c
+++ b/drivers/media/dvb-frontends/ves1820.c
@@ -137,7 +137,7 @@ static int ves1820_set_symbolrate(struct ves1820_state
*state, u32 symbolrate)
NDEC = 3;
/* yeuch! */
- fpxin = state->config->xin * 10;
+ fpxin = state->config->xin * 10ULL;
fptmp = fpxin; do_div(fptmp, 123);
if (symbolrate < fptmp)
SFIL = 1;
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