From: Grazvydas Ignotas Date: Sun, 17 Mar 2013 18:23:22 +0000 (+0200) Subject: usb: phy: twl4030-usb: ignore duplicate events X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ca4f70ce78de9a2fa09741f80cf7bda2f4256ecc;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git usb: phy: twl4030-usb: ignore duplicate events In some rare cases we may get multiple interrupts that will generate duplicate omap_musb_mailbox() calls. This is a problem because each VBUS/ID event generates runtime_pm call in OMAP glue code, causing unbalanced gets or puts and breaking PM. The same goes for initial state, glue already defaults to "no cable" state, so only bother it if we have VBUS or ID. Signed-off-by: Grazvydas Ignotas Reviewed-by: Kishon Vijay Abraham I Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/phy/phy-twl4030-usb.c b/drivers/usb/phy/phy-twl4030-usb.c index 4ad234cc6c9e..7ff67ce373dc 100644 --- a/drivers/usb/phy/phy-twl4030-usb.c +++ b/drivers/usb/phy/phy-twl4030-usb.c @@ -483,9 +483,10 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl) { struct twl4030_usb *twl = _twl; enum omap_musb_vbus_id_status status; + enum omap_musb_vbus_id_status status_prev = twl->linkstat; status = twl4030_usb_linkstat(twl); - if (status > 0) { + if (status > 0 && status != status_prev) { /* FIXME add a set_power() method so that B-devices can * configure the charger appropriately. It's not always * correct to consume VBUS power, and how much current to @@ -523,7 +524,7 @@ static int twl4030_usb_phy_init(struct usb_phy *phy) twl->asleep = 1; status = twl4030_usb_linkstat(twl); - if (status > 0) + if (status == OMAP_MUSB_ID_GROUND || status == OMAP_MUSB_VBUS_VALID) omap_musb_mailbox(twl->linkstat); sysfs_notify(&twl->dev->kobj, NULL, "vbus");