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usb: dwc3: gadget: don't request IRQs in atomic

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We cannot request an IRQ with spinlocks held
as that would trigger a sleeping inside
spinlock warning.

Cc: <stable@vger.kernel.org> # v3.10
Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2013-06-27 10:00:18 +03:00
parent 2b0c49530b
commit b0d7ffd44b
1 changed files with 22 additions and 17 deletions
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39
drivers/usb/dwc3/gadget.c
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@ -1508,6 +1508,15 @@ static int dwc3_gadget_start(struct usb_gadget *g,
int irq;
u32 reg;
irq = platform_get_irq(to_platform_device(dwc->dev), 0);
ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt,
IRQF_SHARED | IRQF_ONESHOT, "dwc3", dwc);
if (ret) {
dev_err(dwc->dev, "failed to request irq #%d --> %d\n",
irq, ret);
goto err0;
}
spin_lock_irqsave(&dwc->lock, flags);
if (dwc->gadget_driver) {
@ -1515,7 +1524,7 @@ static int dwc3_gadget_start(struct usb_gadget *g,
dwc->gadget.name,
dwc->gadget_driver->driver.name);
ret = -EBUSY;
goto err0;
goto err1;
}
dwc->gadget_driver = driver;
@ -1551,42 +1560,38 @@ static int dwc3_gadget_start(struct usb_gadget *g,
ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
goto err0;
goto err2;
}
dep = dwc->eps[1];
ret = __dwc3_gadget_ep_enable(dep, &dwc3_gadget_ep0_desc, NULL, false);
if (ret) {
dev_err(dwc->dev, "failed to enable %s\n", dep->name);
goto err1;
goto err3;
}
/* begin to receive SETUP packets */
dwc->ep0state = EP0_SETUP_PHASE;
dwc3_ep0_out_start(dwc);
irq = platform_get_irq(to_platform_device(dwc->dev), 0);
ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt,
IRQF_SHARED | IRQF_ONESHOT, "dwc3", dwc);
if (ret) {
dev_err(dwc->dev, "failed to request irq #%d --> %d\n",
irq, ret);
goto err1;
}
dwc3_gadget_enable_irq(dwc);
spin_unlock_irqrestore(&dwc->lock, flags);
return 0;
err1:
err3:
__dwc3_gadget_ep_disable(dwc->eps[0]);
err0:
err2:
dwc->gadget_driver = NULL;
err1:
spin_unlock_irqrestore(&dwc->lock, flags);
free_irq(irq, dwc);
err0:
return ret;
}
@ -1600,9 +1605,6 @@ static int dwc3_gadget_stop(struct usb_gadget *g,
spin_lock_irqsave(&dwc->lock, flags);
dwc3_gadget_disable_irq(dwc);
irq = platform_get_irq(to_platform_device(dwc->dev), 0);
free_irq(irq, dwc);
__dwc3_gadget_ep_disable(dwc->eps[0]);
__dwc3_gadget_ep_disable(dwc->eps[1]);
@ -1610,6 +1612,9 @@ static int dwc3_gadget_stop(struct usb_gadget *g,
spin_unlock_irqrestore(&dwc->lock, flags);
irq = platform_get_irq(to_platform_device(dwc->dev), 0);
free_irq(irq, dwc);
return 0;
}