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drivers: net: xgene: Fix crash on DT systems
On DT systems the driver require a clock, but the probe just print a warning and continue, leading to a crash when resetting the device. To fix this crash and properly handle probe deferals only ignore the missing clock if DT isn't used or if the clock doesn't exist. Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de> Acked-by: Iyappan Subramanian <isubramanian@apm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1749,6 +1749,12 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
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pdata->clk = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(pdata->clk)) {
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/* Abort if the clock is defined but couldn't be retrived.
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* Always abort if the clock is missing on DT system as
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* the driver can't cope with this case.
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*/
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if (PTR_ERR(pdata->clk) != -ENOENT || dev->of_node)
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return PTR_ERR(pdata->clk);
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/* Firmware may have set up the clock already. */
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dev_info(dev, "clocks have been setup already\n");
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}
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