usb: musb: Disable interrupts on suspend, enable them on resume

In certain situations, an interrupt triggers on resume, before musb_start()
has been called. This has been observed to cause enumeration issues after
suspend/resume cycles with AM335x.

Signed-off-by: Pascal Huerst <pascal.huerst@gmail.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index d105c6d..4a518ff 100644 (file)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -2449,6 +2449,9 @@ static int musb_suspend(struct device *dev)
        struct musb     *musb = dev_to_musb(dev);
        unsigned long   flags;
 
+       musb_platform_disable(musb);
+       musb_generic_disable(musb);
+
        spin_lock_irqsave(&musb->lock, flags);
 
        if (is_peripheral_active(musb)) {
@@ -2502,6 +2505,9 @@ static int musb_resume(struct device *dev)
        pm_runtime_disable(dev);
        pm_runtime_set_active(dev);
        pm_runtime_enable(dev);
+
+       musb_start(musb);
+
        return 0;
 }