These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / usb / musb / omap2430.c

diff --git a/kernel/drivers/usb/musb/omap2430.c b/kernel/drivers/usb/musb/omap2430.c
index cc752d8..1bd9232 100644 (file)
--- a/kernel/drivers/usb/musb/omap2430.c
+++ b/kernel/drivers/usb/musb/omap2430.c
@@ -391,9 +391,20 @@ static int omap2430_musb_init(struct musb *musb)
        }
        musb->isr = omap2430_musb_interrupt;
 
+       /*
+        * Enable runtime PM for musb parent (this driver). We can't
+        * do it earlier as struct musb is not yet allocated and we
+        * need to touch the musb registers for runtime PM.
+        */
+       pm_runtime_enable(glue->dev);
+       status = pm_runtime_get_sync(glue->dev);
+       if (status < 0)
+               goto err1;
+
        status = pm_runtime_get_sync(dev);
        if (status < 0) {
                dev_err(dev, "pm_runtime_get_sync FAILED %d\n", status);
+               pm_runtime_put_sync(glue->dev);
                goto err1;
        }
 
@@ -426,6 +437,7 @@ static int omap2430_musb_init(struct musb *musb)
        phy_power_on(musb->phy);
 
        pm_runtime_put_noidle(musb->controller);
+       pm_runtime_put_noidle(glue->dev);
        return 0;
 
 err1:
@@ -493,6 +505,11 @@ static int omap2430_musb_exit(struct musb *musb)
 }
 
 static const struct musb_platform_ops omap2430_ops = {
+       .quirks         = MUSB_DMA_INVENTRA,
+#ifdef CONFIG_USB_INVENTRA_DMA
+       .dma_init       = musbhs_dma_controller_create,
+       .dma_exit       = musbhs_dma_controller_destroy,
+#endif
        .init           = omap2430_musb_init,
        .exit           = omap2430_musb_exit,
 
@@ -621,7 +638,11 @@ static int omap2430_probe(struct platform_device *pdev)
                goto err2;
        }
 
-       pm_runtime_enable(&pdev->dev);
+       /*
+        * Note that we cannot enable PM runtime yet for this
+        * driver as we need struct musb initialized first.
+        * See omap2430_musb_init above.
+        */
 
        ret = platform_device_add(musb);
        if (ret) {
@@ -670,11 +691,12 @@ static int omap2430_runtime_resume(struct device *dev)
        struct omap2430_glue            *glue = dev_get_drvdata(dev);
        struct musb                     *musb = glue_to_musb(glue);
 
-       if (musb) {
-               omap2430_low_level_init(musb);
-               musb_writel(musb->mregs, OTG_INTERFSEL,
-                               musb->context.otg_interfsel);
-       }
+       if (!musb)
+               return -EPROBE_DEFER;
+
+       omap2430_low_level_init(musb);
+       musb_writel(musb->mregs, OTG_INTERFSEL,
+                   musb->context.otg_interfsel);
 
        return 0;
 }