On 1/12/2017 7:52 AM, Nicholas Mc Guire wrote:
> ulseep_range() uses hrtimers and provides no advantage over msleep()
> for larger delays. Fix up the 20+ ms delays here passing the adjusted "min"
> value to msleep(). This helps reduce the load on the hrtimer subsystem.
>
> Signed-off-by: Nicholas Mc Guire <hofrat@xxxxxxxxx>
> ---
>
> Patch was compile tested with: x86_64_defconfig + CONFIG_USB_DWC2
> (1 sparse and 6 coccinelle warning - preparing separate patches for that)
>
> Patch is against 4.10-rc3 (localversion-next is next-20170112)
>
> drivers/usb/dwc2/hcd.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index 911c3b3..37ee72d 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -2150,7 +2150,7 @@ static int dwc2_hcd_endpoint_disable(struct dwc2_hsotg *hsotg,
> }
>
> spin_unlock_irqrestore(&hsotg->lock, flags);
> - usleep_range(20000, 40000);
> + msleep(20);
> spin_lock_irqsave(&hsotg->lock, flags);
> qh = ep->hcpriv;
> if (!qh) {
> @@ -3240,7 +3240,7 @@ static void dwc2_conn_id_status_change(struct work_struct *work)
> "Waiting for Peripheral Mode, Mode=%s\n",
> dwc2_is_host_mode(hsotg) ? "Host" :
> "Peripheral");
> - usleep_range(20000, 40000);
> + msleep(20);
> if (++count > 250)
> break;
> }
> @@ -3261,7 +3261,7 @@ static void dwc2_conn_id_status_change(struct work_struct *work)
> dev_info(hsotg->dev, "Waiting for Host Mode, Mode=%s\n",
> dwc2_is_host_mode(hsotg) ?
> "Host" : "Peripheral");
> - usleep_range(20000, 40000);
> + msleep(20);
> if (++count > 250)
> break;
> }
> @@ -3354,7 +3354,7 @@ static void dwc2_port_suspend(struct dwc2_hsotg *hsotg, u16 windex)
>
> spin_unlock_irqrestore(&hsotg->lock, flags);
>
> - usleep_range(200000, 250000);
> + msleep(200);
> } else {
> spin_unlock_irqrestore(&hsotg->lock, flags);
> }
> @@ -3378,7 +3378,7 @@ static void dwc2_port_resume(struct dwc2_hsotg *hsotg)
> pcgctl &= ~PCGCTL_STOPPCLK;
> dwc2_writel(pcgctl, hsotg->regs + PCGCTL);
> spin_unlock_irqrestore(&hsotg->lock, flags);
> - usleep_range(20000, 40000);
> + msleep(20);
> spin_lock_irqsave(&hsotg->lock, flags);
> }
>
> @@ -3691,7 +3691,7 @@ static int dwc2_hcd_hub_control(struct dwc2_hsotg *hsotg, u16 typereq,
> }
>
> /* Clear reset bit in 10ms (FS/LS) or 50ms (HS) */
> - usleep_range(50000, 70000);
> + msleep(50);
> hprt0 &= ~HPRT0_RST;
> dwc2_writel(hprt0, hsotg->regs + HPRT0);
> hsotg->lx_state = DWC2_L0; /* Now back to On state */
>
+Felipe
Acked-by: John Youn <johnyoun@xxxxxxxxxxxx>
I've also fixed this up locally to apply against recent dwc2 patches
for next.
Hi Felipe,
If/when you queue the pending dwc2 patches on testing/next I can
resend this to you.
Regards,
John
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