From d2c0d2c702b3847a0b1bf06996998c142254952e Mon Sep 17 00:00:00 2001 From: Andreas Kemnade <andreas@kemnade.info> Date: Mon, 22 Aug 2016 21:24:22 +0200 Subject: [PATCH 12/13] phy-twl4030-usb: better handle musb_mailbox() failure setting twl->linkstat = MUSB_UNKNOWN upon error in musb_mailbox as introduced in commit 12b7db2bf8b8 ("usb: musb: Return error value from musb_mailbox") causes twl4030_usb_irq() to not detect a state change form cable connected to cable disconnected after such an error so that pm_runtime_put_autosuspend() will not be called and the usage counter gets unbalanced. Such errors happen e.g. if the omap2430 module is not (yet) loaded during plug/unplug events. This patch introduces a flag instead that indicates whether there is information for the musb_mailbox pending and calls musb_mailbox() if that flag is set. Signed-off-by: Andreas Kemnade <andreas@kemnade.info> Tested-by: Tony Lindgren <tony@atomide.com> --- drivers/phy/phy-twl4030-usb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c index d9b10a3..81067b4 100644 --- a/drivers/phy/phy-twl4030-usb.c +++ b/drivers/phy/phy-twl4030-usb.c @@ -172,6 +172,7 @@ struct twl4030_usb { int irq; enum musb_vbus_id_status linkstat; bool vbus_supplied; + bool musb_mailbox_pending; struct delayed_work id_workaround_work; }; @@ -569,9 +570,12 @@ static irqreturn_t twl4030_usb_irq(int irq, void *_twl) pm_runtime_mark_last_busy(twl->dev); pm_runtime_put_autosuspend(twl->dev); } + twl->musb_mailbox_pending = true; + } + if (twl->musb_mailbox_pending) { err = musb_mailbox(status); - if (err) - twl->linkstat = MUSB_UNKNOWN; + if (!err) + twl->musb_mailbox_pending = false; } /* don't schedule during sleep - irq works right then */ @@ -676,6 +680,7 @@ static int twl4030_usb_probe(struct platform_device *pdev) twl->irq = platform_get_irq(pdev, 0); twl->vbus_supplied = false; twl->linkstat = MUSB_UNKNOWN; + twl->musb_mailbox_pending = false; twl->phy.dev = twl->dev; twl->phy.label = "twl4030"; -- 2.10.2