openwrt/target/linux/ipq806x/patches-4.4/096-09-usb-dwc3-drop-ev_buffs-array.patch

From 696c8b1282205caa5206264449f80ef756f14ef7 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <felipe.balbi@linux.intel.com>
Date: Wed, 30 Mar 2016 09:37:03 +0300
Subject: usb: dwc3: drop ev_buffs array

we will be using a single event buffer and that
renders ev_buffs array unnecessary. Let's remove it
in favor of a single pointer to a single event
buffer.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---
 drivers/usb/dwc3/core.c   | 13 ++++---------
 drivers/usb/dwc3/core.h   |  2 +-
 drivers/usb/dwc3/gadget.c |  4 ++--
 3 files changed, 7 insertions(+), 12 deletions(-)

--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -204,7 +204,7 @@ static void dwc3_free_event_buffers(stru
 {
 	struct dwc3_event_buffer	*evt;
 
-	evt = dwc->ev_buffs[0];
+	evt = dwc->ev_buf;
 	if (evt)
 		dwc3_free_one_event_buffer(dwc, evt);
 }
@@ -221,17 +221,12 @@ static int dwc3_alloc_event_buffers(stru
 {
 	struct dwc3_event_buffer *evt;
 
-	dwc->ev_buffs = devm_kzalloc(dwc->dev, sizeof(*dwc->ev_buffs),
-			GFP_KERNEL);
-	if (!dwc->ev_buffs)
-		return -ENOMEM;
-
 	evt = dwc3_alloc_one_event_buffer(dwc, length);
 	if (IS_ERR(evt)) {
 		dev_err(dwc->dev, "can't allocate event buffer\n");
 		return PTR_ERR(evt);
 	}
-	dwc->ev_buffs[0] = evt;
+	dwc->ev_buf = evt;
 
 	return 0;
 }
@@ -246,7 +241,7 @@ static int dwc3_event_buffers_setup(stru
 {
 	struct dwc3_event_buffer	*evt;
 
-	evt = dwc->ev_buffs[0];
+	evt = dwc->ev_buf;
 	dwc3_trace(trace_dwc3_core,
 			"Event buf %p dma %08llx length %d\n",
 			evt->buf, (unsigned long long) evt->dma,
@@ -269,7 +264,7 @@ static void dwc3_event_buffers_cleanup(s
 {
 	struct dwc3_event_buffer	*evt;
 
-	evt = dwc->ev_buffs[0];
+	evt = dwc->ev_buf;
 
 	evt->lpos = 0;
 
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -748,7 +748,7 @@ struct dwc3 {
 	struct platform_device	*xhci;
 	struct resource		xhci_resources[DWC3_XHCI_RESOURCES_NUM];
 
-	struct dwc3_event_buffer **ev_buffs;
+	struct dwc3_event_buffer *ev_buf;
 	struct dwc3_ep		*eps[DWC3_ENDPOINTS_NUM];
 
 	struct usb_gadget	gadget;
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2576,7 +2576,7 @@ static irqreturn_t dwc3_process_event_bu
 	int left;
 	u32 reg;
 
-	evt = dwc->ev_buffs[0];
+	evt = dwc->ev_buf;
 	left = evt->count;
 
 	if (!(evt->flags & DWC3_EVENT_PENDING))
@@ -2635,7 +2635,7 @@ static irqreturn_t dwc3_check_event_buf(
 	u32 count;
 	u32 reg;
 
-	evt = dwc->ev_buffs[0];
+	evt = dwc->ev_buf;
 
 	count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));
 	count &= DWC3_GEVNTCOUNT_MASK;