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net: ethernet: cavium: use div64_u64() instead of do_div()

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do_div() does a 64-by-32 division.
When the divisor is u64, do_div() truncates it to 32 bits, this means it
can test non-zero and be truncated to zero for division.

fix do_div.cocci warning:
do_div() does a 64-by-32 division, please consider using div64_u64 instead.

Signed-off-by: Wang Qing <wangqing@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wang Qing 2022-02-09 00:39:19 -08:00 committed by David S. Miller
parent 237d20c208
commit 038fcdaf04
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/cavium/liquidio/lio_main.c
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@ -1539,7 +1539,7 @@ static int liquidio_ptp_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
* compute the delta in terms of coprocessor clocks.
*/
delta = (u64)ppb << 32;
do_div(delta, oct->coproc_clock_rate);
div64_u64(delta, oct->coproc_clock_rate);
spin_lock_irqsave(&lio->ptp_lock, flags);
comp = lio_pci_readq(oct, CN6XXX_MIO_PTP_CLOCK_COMP);
@ -1672,7 +1672,7 @@ static void liquidio_ptp_init(struct octeon_device *oct)
u64 clock_comp, cfg;
clock_comp = (u64)NSEC_PER_SEC << 32;
do_div(clock_comp, oct->coproc_clock_rate);
div64_u64(clock_comp, oct->coproc_clock_rate);
lio_pci_writeq(oct, clock_comp, CN6XXX_MIO_PTP_CLOCK_COMP);
/* Enable */