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media: dvb-frontends: ves1820: use 64-bit arithmetic instead of 32-bit 

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 <gustavo@embeddedor.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Gustavo A. R. Silva 2018-02-06 11:47:09 -05:00 committed by Mauro Carvalho Chehab
parent 1ae207fa7b
commit 91e0c0c1b0
1 changed files with 1 additions and 1 deletions
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drivers/media/dvb-frontends/ves1820.c
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@ -137,7 +137,7 @@ static int ves1820_set_symbolrate(struct ves1820_state *state, u32 symbolrate)
NDEC = 3; NDEC = 3;
/* yeuch! */ /* yeuch! */
fpxin = state->config->xin * 10; fpxin = state->config->xin * 10ULL;
fptmp = fpxin; do_div(fptmp, 123); fptmp = fpxin; do_div(fptmp, 123);
if (symbolrate < fptmp) if (symbolrate < fptmp)
SFIL = 1; SFIL = 1;