From 74674cbf858ff6a83c3f06f4ab0ffa5d3c91bf0b Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Wed, 13 Apr 2016 16:44:39 +0300 Subject: 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 --- drivers/usb/dwc3/core.h | 2 ++ drivers/usb/dwc3/gadget.c | 1 + 2 files changed, 3 insertions(+) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index 94b9fd2d583e..484bb5d8261c 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -482,6 +482,7 @@ struct dwc3_event_buffer { * @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 dwc3_ep { 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 194775184a58..8b932033d29b 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1845,6 +1845,7 @@ static int dwc3_gadget_init_hw_endpoints(struct dwc3 *dwc, (epnum & 1) ? "in" : "out"); dep->endpoint.name = dep->name; + spin_lock_init(&dep->lock); dwc3_trace(trace_dwc3_gadget, "initializing %s", dep->name); -- cgit v1.2.3