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| author | Fugang Duan <fugang.duan@nxp.com> | 2021-06-16 12:14:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-06-23 15:42:54 +0300 |
| commit | 4f6e7098f19b8554470f6ad28030d1550c0bd983 (patch) | |
| tree | 3b09099088ca603e6a7b578a96779a85f0e2f5cf | |
| parent | 1af3a8e91f1accd45f69bd430f92c3a5698cdb56 (diff) | |
| download | linux-4f6e7098f19b8554470f6ad28030d1550c0bd983.tar.xz | |
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 ce8e5555f3e0..d71eac7e1924 100644 --- a/drivers/net/ethernet/freescale/fec_ptp.c +++ b/drivers/net/ethernet/freescale/fec_ptp.c @@ -602,6 +602,10 @@ 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); |