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usb: dwc3: core: avoid Overflow events

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commit e71d363d9c upstream.

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.

Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Felipe Balbi
2016-12-23 14:40:40 +02:00
committed by Greg Kroah-Hartman
parent 2b95c939cb
commit 9bdd47c53b
1 changed files with 1 additions and 3 deletions
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4
drivers/usb/dwc3/core.h
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@@ -43,9 +43,7 @@
#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