On Fri, Jan 18, 2013 at 02:17:08PM +0200, Roger Quadros wrote:
> + tll->ch_clk = devm_kzalloc(dev, sizeof(struct clk * [tll->nch]),
> + GFP_KERNEL);
> + if (!tll->ch_clk) {
> + ret = -ENOMEM;
> + dev_err(dev, "Couldn't allocate memory for channel clocks\n");
> + goto err_clk_alloc;
> + }
> +
> + for (i = 0; i < tll->nch; i++) {
> + char clkname[] = "usb_tll_hs_usb_chx_clk";
> + struct clk *fck;
> +
> + snprintf(clkname, sizeof(clkname),
> + "usb_tll_hs_usb_ch%d_clk", i);
> + fck = clk_get(dev, clkname);
> +
> + if (IS_ERR(fck))
> + dev_dbg(dev, "can't get clock : %s\n", clkname);
> + else
> + tll->ch_clk[i] = fck;
Hmm. I'd actually suggest that this becomes:
tll->ch_clk[i] = fck;
if (IS_ERR(fck)
dev_dbg(dev, "can't get clock: %s\n", clkname);
so that tll->ch_clk is always written to.
> static int usbtll_omap_remove(struct platform_device *pdev)
> {
> struct usbtll_omap *tll = platform_get_drvdata(pdev);
> + int i;
> +
> + for (i = 0; i < tll->nch; i++)
> + clk_put(tll->ch_clk[i]);
And change this to:
for (i = 0; i < tll->nch; i++)
if (!IS_ERR(tll->ch_clk[i]))
clk_put(tll->ch_clk[i]);
so that you're not passing a NULL pointer in.
> + for (i = 0; i < tll->nch; i++) {
> + if (is_ehci_tll_mode(pdata->port_mode[i])) {
> + int r;
>
> - if (is_ehci_tll_mode(pdata->port_mode[1]))
> - clk_enable(tll->usbtll_p2_fck);
> + if (!tll->ch_clk[i])
if (IS_ERR(tll->ch_clk[i]))
> + continue;
> +
> + r = clk_enable(tll->ch_clk[i]);
> + if (r) {
> + dev_err(dev,
> + "Error enabling ch %d clock: %d\n", i, r);
> + }
> + }
> + }
> @@ -387,11 +409,12 @@ static int usbtll_runtime_suspend(struct device *dev)
>
> spin_lock_irqsave(&tll->lock, flags);
>
> - if (is_ehci_tll_mode(pdata->port_mode[0]))
> - clk_disable(tll->usbtll_p1_fck);
> -
> - if (is_ehci_tll_mode(pdata->port_mode[1]))
> - clk_disable(tll->usbtll_p2_fck);
> + for (i = 0; i < tll->nch; i++) {
> + if (is_ehci_tll_mode(pdata->port_mode[i])) {
> + if (tll->ch_clk[i])
if (!IS_ERR(tll->ch_clk[i]))
> + clk_disable(tll->ch_clk[i]);
> + }
> + }
>
> spin_unlock_irqrestore(&tll->lock, flags);
>
> --
> 1.7.4.1
>
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