On Tue, Sep 25, 2018 at 01:42:12PM -0300, Fabio Estevam wrote:

Hi Abel,

On Mon, Sep 24, 2018 at 7:39 AM, Abel Vesa [off-list ref] wrote:

quoted

+static long imx_clk_composite_divider_round_rate(struct clk_hw *hw,
+                                               unsigned long rate,
+                                               unsigned long *prate)
+{
+       int prediv_value;
+       int div_value;
+
+       imx_clk_composite_compute_dividers(rate, *prate,
+                                               &prediv_value, &div_value);
+
+       rate = DIV_ROUND_UP_ULL((u64)*prate, prediv_value);

You assing a value to 'rate' here.

quoted

+       rate = DIV_ROUND_UP_ULL((u64)rate, div_value);

And then overwrite it immediately after.

It's:
	rate = *prate / prediv_value;
	rate = rate / div_value;

To me this looks correct. However, For an unsigned long type we have
DIV_ROUND_UP() with which we do not need any casting. For 64bit code
unsigned long is 64bit anyway which makes the cast a no-op and for 32bit
code there's also no point in exanding the initial 32bit value to 64bit.

Sascha

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