On Sun, Jan 19, 2014 at 12:48:48AM +0100, Hans de Goede wrote:
> +static int ahci_enable_clks(struct device *dev, struct ahci_host_priv *hpriv)
> +{
> + int c, rc;
> +
> + for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++) {
for (c = 0; c < AHCI_MAX_CLKS && !IS_ERR(hpriv->clks[c]); c++) {
> + rc = clk_prepare_enable(hpriv->clks[c]);
> + if (rc) {
> + dev_err(dev, "clock prepare enable failed");
> + goto disable_unprepare_clk;
> + }
> + }
> + return 0;
> +
> +disable_unprepare_clk:
> + while (--c >= 0)
> + clk_disable_unprepare(hpriv->clks[c]);
> + return rc;
> +}
> +
> +static void ahci_disable_clks(struct ahci_host_priv *hpriv)
> +{
> + int c;
> +
> + for (c = AHCI_MAX_CLKS - 1; c >= 0; c--)
> + if (hpriv->clks[c])
if (!IS_ERR(hpriv->clks[c]))
> + clk_disable_unprepare(hpriv->clks[c]);
> +}
> +
> +static void ahci_put_clks(struct ahci_host_priv *hpriv)
> +{
> + int c;
> +
> + for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
for (c = 0; c < AHCI_MAX_CLKS && !IS_ERR(hpriv->clks[c]); c++)
> + clk_put(hpriv->clks[c]);
> +}
Better still for this one, consider using devm_clk_get() - in which case
the above is even more important to get right. We really should have
a devm_of_clk_get() too.
--
FTTC broadband for 0.8mile line: 5.8Mbps down 500kbps up. Estimation
in database were 13.1 to 19Mbit for a good line, about 7.5+ for a bad.
Estimate before purchase was "up to 13.2Mbit".
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