On Tue, Jul 16, 2013 at 05:22:15PM +0200, Boris BREZILLON wrote:
> @@ -41,6 +41,10 @@ extern int usb_disabled(void);
>
> static void at91_start_clock(void)
> {
> + if (uclk) {
if (!IS_ERR(uclk)) {
> + clk_set_rate(uclk, 48000000);
> + clk_prepare_enable(uclk);
> + }
> clk_prepare_enable(hclk);
> clk_prepare_enable(iclk);
> clk_prepare_enable(fclk);
> @@ -52,6 +56,8 @@ static void at91_stop_clock(void)
> clk_disable_unprepare(fclk);
> clk_disable_unprepare(iclk);
> clk_disable_unprepare(hclk);
> + if (uclk)
if (!IS_ERR(uclk))
> + clk_disable_unprepare(uclk);
> clocked = 0;
> }
>
> @@ -144,6 +150,11 @@ static int usb_hcd_at91_probe(const struct hc_driver *driver,
> goto err2;
> }
>
> + uclk = clk_get(&pdev->dev, "usb_clk");
> + if (IS_ERR(uclk)) {
> + uclk = NULL;
Remove this line.
> + dev_warn(&pdev->dev, "failed to get usb_clk\n");
> + }
> iclk = clk_get(&pdev->dev, "ohci_clk");
> if (IS_ERR(iclk)) {
> dev_err(&pdev->dev, "failed to get ohci_clk\n");
> @@ -212,10 +223,11 @@ static void usb_hcd_at91_remove(struct usb_hcd *hcd,
> release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
> usb_put_hcd(hcd);
>
What if uclk is NULL here?
if (!IS_ERR(uclk))
> + clk_put(uclk);
> clk_put(hclk);
> clk_put(fclk);
> clk_put(iclk);
> - fclk = iclk = hclk = NULL;
> + fclk = iclk = hclk = uclk = NULL;
Don't.
Range of invalid struct clk pointers: those which IS_ERR(clk) returns true.
Therefore, the range of valid struct clk pointers is: _____________________
(answer on a post card, stamped and addressed to...)
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