From: Felipe Balbi Date: Fri, 23 Dec 2016 12:40:40 +0000 (+0200) Subject: usb: dwc3: core: avoid Overflow events X-Git-Tag: v4.14-rc1~1726^2~21^2~19 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=e71d363d9c611c99fb78f53bfee99616e7fe352c;p=platform%2Fkernel%2Flinux-rpi.git 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 --- diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h index de5a857..7bf8016 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