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| author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2018-02-06 11:46:59 -0500 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2018-02-26 08:07:13 -0500 |
| commit | 1ae207fa7b70e7bd3bc0f3e5e3704edf55e45b68 (patch) | |
| tree | 72801c43c1ba13ec3a86f470d72ed7193d64bde4 /drivers/media/dvb-frontends/rtl2832.c | |
| parent | d13a0139d7874a0577b5955d6eed895517d23b72 (diff) | |
| download | linux-1ae207fa7b70e7bd3bc0f3e5e3704edf55e45b68.tar.bz2 | |
media: rtl2832: use 64-bit arithmetic instead of 32-bit in rtl2832_set_frontend
Add suffix ULL to constant 7 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 dev->pdata->clk * 7 is currently being evaluated
using 32-bit arithmetic.
Addresses-Coverity-ID: 1271223 ("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>
Diffstat (limited to 'drivers/media/dvb-frontends/rtl2832.c')
| -rw-r--r-- | drivers/media/dvb-frontends/rtl2832.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/media/dvb-frontends/rtl2832.c b/drivers/media/dvb-frontends/rtl2832.c index 94bf5b7d6f3f..fa3b8169c1a5 100644 --- a/drivers/media/dvb-frontends/rtl2832.c +++ b/drivers/media/dvb-frontends/rtl2832.c @@ -498,7 +498,7 @@ static int rtl2832_set_frontend(struct dvb_frontend *fe) * RSAMP_RATIO = floor(CrystalFreqHz * 7 * pow(2, 22) * / ConstWithBandwidthMode) */ - num = dev->pdata->clk * 7; + num = dev->pdata->clk * 7ULL; num *= 0x400000; num = div_u64(num, bw_mode); resamp_ratio = num & 0x3ffffff; @@ -511,7 +511,7 @@ static int rtl2832_set_frontend(struct dvb_frontend *fe) * / (CrystalFreqHz * 7)) */ num = bw_mode << 20; - num2 = dev->pdata->clk * 7; + num2 = dev->pdata->clk * 7ULL; num = div_u64(num, num2); num = -num; cfreq_off_ratio = num & 0xfffff; |