usb: dwc3: core: avoid Overflow events
commit e71d363d9c611c99fb78f53bfee99616e7fe352c 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>
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1 changed files with 1 additions and 3 deletions
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@ -42,9 +42,7 @@
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#define DWC3_XHCI_RESOURCES_NUM 2
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#define DWC3_SCRATCHBUF_SIZE 4096 /* each buffer is assumed to be 4KiB */
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#define DWC3_EVENT_SIZE 4 /* bytes */
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#define DWC3_EVENT_MAX_NUM 64 /* 2 events/endpoint */
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#define DWC3_EVENT_BUFFERS_SIZE (DWC3_EVENT_SIZE * DWC3_EVENT_MAX_NUM)
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#define DWC3_EVENT_BUFFERS_SIZE 4096
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#define DWC3_EVENT_TYPE_MASK 0xfe
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#define DWC3_EVENT_TYPE_DEV 0
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