diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2014-10-20 10:45:39 (GMT) |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2014-11-03 16:01:23 (GMT) |
| commit | 7b093f773b85dd816c5717193ec94a7cfec73a09 (patch) | |
| tree | cb30b4e7b4c368fd5467b03c59c8001a8e35184b /drivers | |
| parent | 5b9451f8c4fbaf0549139755fb45ff2b57975b7f (diff) | |
| download | linux-7b093f773b85dd816c5717193ec94a7cfec73a09.tar.xz | |
usb: dwc2: gadget: fix calls to phy control functions in suspend/resume code
This patch moves calls to phy enable/disable out of spinlock protected
blocks in device suspend/resume to fix incorrect caller context. Phy
related functions must not be called from atomic context. To protect
device internal state from a race during suspend, a call to
s3c_hsotg_core_disconnect() is added under a spinlock, what prevents any
further activity on the usb bus.
Acked-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/dwc2/gadget.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 5872db9..fcd2bb5 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3642,11 +3642,13 @@ static int s3c_hsotg_suspend(struct platform_device *pdev, pm_message_t state) hsotg->driver->driver.name); spin_lock_irqsave(&hsotg->lock, flags); + s3c_hsotg_core_disconnect(hsotg); s3c_hsotg_disconnect(hsotg); - s3c_hsotg_phy_disable(hsotg); hsotg->gadget.speed = USB_SPEED_UNKNOWN; spin_unlock_irqrestore(&hsotg->lock, flags); + s3c_hsotg_phy_disable(hsotg); + if (hsotg->driver) { int ep; for (ep = 0; ep < hsotg->num_of_eps; ep++) @@ -3675,8 +3677,9 @@ static int s3c_hsotg_resume(struct platform_device *pdev) hsotg->supplies); } - spin_lock_irqsave(&hsotg->lock, flags); s3c_hsotg_phy_enable(hsotg); + + spin_lock_irqsave(&hsotg->lock, flags); s3c_hsotg_core_init_disconnected(hsotg); s3c_hsotg_core_connect(hsotg); spin_unlock_irqrestore(&hsotg->lock, flags); |