diff options
| author | Andreas Kemnade <andreas@kemnade.info> | 2016-08-22 21:24:22 +0200 |
|---|---|---|
| committer | Kishon Vijay Abraham I <kishon@ti.com> | 2016-09-14 07:29:11 +0200 |
| commit | 78489c7c48d462c2a4fa9f388dd091f829573b64 (patch) | |
| tree | dd29b8eec5108cc10d0dd23b12ffe34a59ff5404 /drivers/phy | |
| parent | phy: sun4i-usb: Use spinlock to guard phyctl register access (diff) | |
| download | linux-78489c7c48d462c2a4fa9f388dd091f829573b64.tar.xz linux-78489c7c48d462c2a4fa9f388dd091f829573b64.zip | |
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>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/phy-twl4030-usb.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c index d9b10a39a2cf..81067b461098 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"; |