Commit cb3cefe3 authored by Fugang Duan's avatar Fugang Duan Committed by David S. Miller
Browse files

net: fec_ptp: add clock rate zero check 



Add clock rate zero check to fix coverity issue of "divide by 0".

Fixes: commit 85bd1798 ("net: fec: fix spin_lock dead lock")
Signed-off-by: default avatarFugang Duan <fugang.duan@nxp.com>
Signed-off-by: default avatarJoakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 56b786d8

drivers/net/ethernet/freescale/fec_ptp.c

+4 −0
Original line number Diff line number Diff line
@@ -604,6 +604,10 @@ void fec_ptp_init(struct platform_device *pdev, int irq_idx) 
	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);