usb: dwc3: gadget: add a per-endpoint request queue lock
This will allow us to process several endpoints at a
time by making sure that we lock only shared
resources.
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 94b9fd2..484bb5d 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -482,6 +482,7 @@
* @endpoint: usb endpoint
* @pending_list: list of pending requests for this endpoint
* @started_list: list of started requests on this endpoint
+ * @lock: spinlock for endpoint request queue traversal
* @regs: pointer to first endpoint register
* @trb_pool: array of transaction buffers
* @trb_pool_dma: dma address of @trb_pool
@@ -504,6 +505,7 @@
struct list_head pending_list;
struct list_head started_list;
+ spinlock_t lock;
void __iomem *regs;
struct dwc3_trb *trb_pool;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 1947751..8b93203 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1845,6 +1845,7 @@
(epnum & 1) ? "in" : "out");
dep->endpoint.name = dep->name;
+ spin_lock_init(&dep->lock);
dwc3_trace(trace_dwc3_gadget, "initializing %s", dep->name);