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ice: Use div64_u64 instead of div_u64 in adjfine

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[ Upstream commit 0013881c11 ]

Change the division in ice_ptp_adjfine from div_u64 to div64_u64.
div_u64 is used when the divisor is 32 bit but in this case incval is
64 bit and it caused incorrect calculations and incval adjustments.

Fixes: 06c16d89d2 ("ice: register 1588 PTP clock device object for E810 devices")
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Karol Kolacinski
2021-11-04 14:52:11 +01:00
committed by Greg Kroah-Hartman
parent 68014890e4
commit 89f9c88014
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/intel/ice/ice_ptp.c
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@@ -459,7 +459,7 @@ static int ice_ptp_adjfine(struct ptp_clock_info *info, long scaled_ppm)
scaled_ppm = -scaled_ppm;
}
while ((u64)scaled_ppm > div_u64(U64_MAX, incval)) {
while ((u64)scaled_ppm > div64_u64(U64_MAX, incval)) {
/* handle overflow by scaling down the scaled_ppm and
* the divisor, losing some precision
*/