From 640eb654064d1085b65dbd2039a23fcfbf4059ac Mon Sep 17 00:00:00 2001 From: Andy Duan Date: Wed, 7 Nov 2018 14:10:55 +0800 Subject: [PATCH] MLK-20190-01 ptp: fec: add clock rate zero check Add clock rate zero check to fixes coverity issue of "divide by 0". Reviewed-by: Haibo Chen Signed-off-by: Fugang Duan --- drivers/net/ethernet/freescale/fec_ptp.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/freescale/fec_ptp.c b/drivers/net/ethernet/freescale/fec_ptp.c index 6ebad3fac81d..07a471144bfe 100644 --- a/drivers/net/ethernet/freescale/fec_ptp.c +++ b/drivers/net/ethernet/freescale/fec_ptp.c @@ -579,6 +579,10 @@ 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);