[PATCH] mlxsw: spectrum_qdisc: Fix 64-bit division error in mlxsw_sp_qdisc_tbf_rate_kbps

From: Nathan Chancellor
Date: Thu Jan 30 2020 - 18:26:57 EST


When building arm32 allmodconfig:

ERROR: "__aeabi_uldivmod"
[drivers/net/ethernet/mellanox/mlxsw/mlxsw_spectrum.ko] undefined!

rate_bytes_ps has type u64, we need to use a 64-bit division helper to
avoid a build error.

Fixes: a44f58c41bfb ("mlxsw: spectrum_qdisc: Support offloading of TBF Qdisc")
Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
index 79a2801d59f6..65e681ef01e8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_qdisc.c
@@ -614,7 +614,7 @@ mlxsw_sp_qdisc_tbf_rate_kbps(struct tc_tbf_qopt_offload_replace_params *p)
/* TBF interface is in bytes/s, whereas Spectrum ASIC is configured in
* Kbits/s.
*/
- return p->rate.rate_bytes_ps / 1000 * 8;
+ return div_u64(p->rate.rate_bytes_ps, 1000 * 8);
}

static int
--
2.25.0