From e71d363d9c611c99fb78f53bfee99616e7fe352c Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 23 Dec 2016 14:40:40 +0200 Subject: [PATCH] usb: dwc3: core: avoid Overflow events Now that we're handling so many transfers at a time and for some dwc3 revisions LPM events *must* be enabled, we can fall into a situation where too many events fire and we start receiving Overflow events. Let's do what XHCI does and allocate a full page for the Event Ring, this will avoid any future issues. Cc: # v4.9 Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/core.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index de5a8570be04..7bf8016e1182 100644 --- a/drivers/usb/dwc3/core.h +++ b/drivers/usb/dwc3/core.h @@ -45,9 +45,7 @@ #define DWC3_XHCI_RESOURCES_NUM 2 #define DWC3_SCRATCHBUF_SIZE 4096 /* each buffer is assumed to be 4KiB */ -#define DWC3_EVENT_SIZE 4 /* bytes */ -#define DWC3_EVENT_MAX_NUM 64 /* 2 events/endpoint */ -#define DWC3_EVENT_BUFFERS_SIZE (DWC3_EVENT_SIZE * DWC3_EVENT_MAX_NUM) +#define DWC3_EVENT_BUFFERS_SIZE 4096 #define DWC3_EVENT_TYPE_MASK 0xfe #define DWC3_EVENT_TYPE_DEV 0 -- 2.20.1