[PATCH net] net: mvpp2: Fix clock resource by adding an optional bus clock

Hi Thomas,
 
 On jeu., sept. 28 2017, Thomas Petazzoni [off-list ref] wrote:

quoted

 	/* List of pointers to port structures */
 	struct mvpp2_port **port_list;

@@ -7963,6 +7964,16 @@ static int mvpp2_probe(struct platform_device *pdev)
 		err = clk_prepare_enable(priv->mg_clk);
 		if (err < 0)
 			goto err_gop_clk;
+
+		priv->axi_clk = devm_clk_get(&pdev->dev, "axi_clk");
+		if (IS_ERR(priv->axi_clk)) {
+			err = PTR_ERR(priv->axi_clk);
+			priv->axi_clk = NULL;

You should handle -EPROBE_DEFER here. Indeed, if we have -EPROBE_DEFER,
we shouldn't treat it as "the clock doesn't exist, so let's skip it and
continue", but rather as "the clock exists, but isn't ready to use yet,
let's try later".

You're totally right, I will send a v2 (I will also fix the other issue
you spotted).

Thanks,

Gregory

Thanks!

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com