diff options
| author | Fugang Duan <fugang.duan@nxp.com> | 2021-06-16 17:14:25 +0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2021-06-30 08:49:35 -0400 |
| commit | d35c6cec87ae26ff982a2ffbbc34989e659cb825 (patch) | |
| tree | 731dc5caeeead99a920ce139f8e719091a19a040 | |
| parent | 9bdaa15711fade6eab36263b33b35cdc09661c53 (diff) | |
net: fec_ptp: add clock rate zero check
commit cb3cefe3f3f8af27c6076ef7d1f00350f502055d upstream.
Add clock rate zero check to fix coverity issue of "divide by 0".
Fixes: commit 85bd1798b24a ("net: fec: fix spin_lock dead lock")
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/freescale/fec_ptp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c index 123181612595..031d4b3a544c 100644 --- a/drivers/net/ethernet/freescale/fec_ptp.c +++ b/drivers/net/ethernet/freescale/fec_ptp.c @@ -586,6 +586,10 @@ void fec_ptp_init(struct platform_device *pdev) fep->ptp_caps.enable = fec_ptp_enable; fep->cycle_speed = clk_get_rate(fep->clk_ptp); + if (!fep->cycle_speed) { + fep->cycle_speed = NSEC_PER_SEC; + dev_err(&fep->pdev->dev, "clk_ptp clock rate is zero\n"); + } fep->ptp_inc = NSEC_PER_SEC / fep->cycle_speed; spin_lock_init(&fep->tmreg_lock); |