From a66c275b3d5d8467d770dabd30927f5d5e857294 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@ti.com>
Date: Mon, 21 Sep 2015 11:08:36 +0300
Subject: [PATCH] usb: dwc3: gadget: Fix BUG in RT config
Using spin_lock() in hard irq handler is pointless
and causes a BUG() in RT (real-time) configuration
so get rid of it.
The reason it's pointless is because the driver is
basically accessing register which is, anyways,
atomic.
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
---
drivers/usb/dwc3/gadget.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 0c25704dcb6ba..1e8bdf8178113 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2665,8 +2665,6 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
int i;
irqreturn_t ret = IRQ_NONE;
- spin_lock(&dwc->lock);
-
for (i = 0; i < dwc->num_event_buffers; i++) {
irqreturn_t status;
@@ -2675,8 +2673,6 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
ret = status;
}
- spin_unlock(&dwc->lock);
-
return ret;
}
--
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