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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 <haibo.chen@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
pull/10/head
Andy Duan 2018-11-07 14:10:55 +08:00
parent 2da21792b5
commit 640eb65406
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/freescale/fec_ptp.c
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@ -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);