we don't plan on using multiple event buffers, but
if we find a good use case for it, this little trick
will help us avoid a loop in hardirq handler looping
for each and every event buffer.
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
---
drivers/usb/dwc3/gadget.c | 28 +++++++++++++---------------
1 file changed, 13 insertions(+), 15 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 96dfde011c76..ba16e1dd32b0 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1536,7 +1536,7 @@ static int dwc3_gadget_start(struct usb_gadget *g,
irq = platform_get_irq(to_platform_device(dwc->dev), 0);
ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt,
- IRQF_SHARED, "dwc3", dwc);
+ IRQF_SHARED, "dwc3", dwc->ev_buf);
if (ret) {
dev_err(dwc->dev, "failed to request irq #%d --> %d\n",
irq, ret);
@@ -1636,7 +1636,7 @@ err2:
err1:
spin_unlock_irqrestore(&dwc->lock, flags);
- free_irq(irq, dwc);
+ free_irq(irq, dwc->ev_buf);
err0:
return ret;
@@ -2602,14 +2602,13 @@ static void dwc3_process_event_entry(struct dwc3 *dwc,
}
}
-static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc)
+static irqreturn_t dwc3_process_event_buf(struct dwc3_event_buffer *evt)
{
- struct dwc3_event_buffer *evt;
+ struct dwc3 *dwc = evt->dwc;
irqreturn_t ret = IRQ_NONE;
int left;
u32 reg;
- evt = dwc->ev_buf;
left = evt->count;
if (!(evt->flags & DWC3_EVENT_PENDING))
@@ -2649,27 +2648,26 @@ static irqreturn_t dwc3_process_event_buf(struct dwc3 *dwc)
return ret;
}
-static irqreturn_t dwc3_thread_interrupt(int irq, void *_dwc)
+static irqreturn_t dwc3_thread_interrupt(int irq, void *_evt)
{
- struct dwc3 *dwc = _dwc;
+ struct dwc3_event_buffer *evt = _evt;
+ struct dwc3 *dwc = evt->dwc;
unsigned long flags;
irqreturn_t ret = IRQ_NONE;
spin_lock_irqsave(&dwc->lock, flags);
- ret = dwc3_process_event_buf(dwc);
+ ret = dwc3_process_event_buf(evt);
spin_unlock_irqrestore(&dwc->lock, flags);
return ret;
}
-static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc)
+static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt)
{
- struct dwc3_event_buffer *evt;
+ struct dwc3 *dwc = evt->dwc;
u32 count;
u32 reg;
- evt = dwc->ev_buf;
-
count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));
count &= DWC3_GEVNTCOUNT_MASK;
if (!count)
@@ -2686,11 +2684,11 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3 *dwc)
return IRQ_WAKE_THREAD;
}
-static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
+static irqreturn_t dwc3_interrupt(int irq, void *_evt)
{
- struct dwc3 *dwc = _dwc;
+ struct dwc3_event_buffer *evt = _evt;
- return dwc3_check_event_buf(dwc);
+ return dwc3_check_event_buf(evt);
}
/**
--
2.8.0.rc2
--
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