Felipe,
On 10/01/18 15:11, Roger Quadros wrote:
> The USB PHYs should be requested only once during the life cycle of
> this driver.
>
> As dwc3_core_init() is called during system suspend/resume
> it will result in multiple calls to dwc3_core_get_phy() which is wrong.
>
> To prevent that let's move dwc3_core_get_phy() call
> outside dwc3_core_init().
>
> Fixes: 541768b08a4 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys")
> Cc: linux-stable <stable@xxxxxxxxxxxxxxx> # >= v4.13
> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
FYI. this patch brings the code back to
revert 541768b08a40 ("usb: dwc3: core: Call dwc3_core_get_phy() before initializing phys")
revert f54edb539c11 ("usb: dwc3: core: initialize ULPI before trying to get the PHY")
So looks like this will break ULPI PHY case?
Where do we initialize ULPI PHY, in dwc3_phy_setup()?
if so then 541768b08a40 breaks the ULPI PHY case as well, right?
> ---
> drivers/usb/dwc3/core.c | 10 ++++------
> 1 file changed, 4 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index 0783250..1274251 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -722,8 +722,6 @@ static void dwc3_core_setup_global_control(struct dwc3 *dwc)
> dwc3_writel(dwc->regs, DWC3_GCTL, reg);
> }
>
> -static int dwc3_core_get_phy(struct dwc3 *dwc);
> -
> /**
> * dwc3_core_init - Low-level initialization of DWC3 Core
> * @dwc: Pointer to our controller context structure
> @@ -754,10 +752,6 @@ static int dwc3_core_init(struct dwc3 *dwc)
> dwc->maximum_speed = USB_SPEED_HIGH;
> }
>
> - ret = dwc3_core_get_phy(dwc);
> - if (ret)
> - goto err0;
> -
> ret = dwc3_core_soft_reset(dwc);
> if (ret)
> goto err0;
> @@ -1177,6 +1171,10 @@ static int dwc3_probe(struct platform_device *pdev)
> platform_set_drvdata(pdev, dwc);
> dwc3_cache_hwparams(dwc);
>
> + ret = dwc3_core_get_phy(dwc);
> + if (ret)
> + goto err0;
> +
> spin_lock_init(&dwc->lock);
>
> pm_runtime_set_active(dev);
>
--
cheers,
-roger
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