@@ -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;
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> --- Changes in v2: - Update subject and changelog to better reflect the proposed code changes. - Add suffix ULL to constant instead of casting a variable. Changes in v3: - Mention the specific Coverity report in the commit message. drivers/media/dvb-frontends/rtl2832.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)