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[USBPORT] Add USB2_BIT_STUFFING_OVERHEAD constant.

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This commit is contained in:
Vadim Galyant 2018-01-22 14:15:57 +09:00
parent 797ebcab72
commit f37a3dc42f
2 changed files with 3 additions and 1 deletions
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2
drivers/usb/usbport/endpoint.c
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@ -47,7 +47,7 @@ USBPORT_CalculateUsbBandwidth(IN PDEVICE_OBJECT FdoDevice,
} }
else else
{ {
Bandwidth = (EndpointProperties->TotalMaxPacketSize + Overhead) * 8 * 7 / 6; Bandwidth = (EndpointProperties->TotalMaxPacketSize + Overhead) * USB2_BIT_STUFFING_OVERHEAD;
} }
if (EndpointProperties->DeviceSpeed == UsbLowSpeed) if (EndpointProperties->DeviceSpeed == UsbLowSpeed)

2
drivers/usb/usbport/usbport.h
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@ -479,6 +479,8 @@ typedef struct _TIMER_WORK_QUEUE_ITEM {
#define USB2_HS_SS_ISOCHRONOUS_IN_OVERHEAD 39 #define USB2_HS_SS_ISOCHRONOUS_IN_OVERHEAD 39
#define USB2_HS_CS_ISOCHRONOUS_IN_OVERHEAD 38 #define USB2_HS_CS_ISOCHRONOUS_IN_OVERHEAD 38
#define USB2_BIT_STUFFING_OVERHEAD (8 * (7/6)) // 7.1.9 Bit Stuffing
typedef union _USB2_TT_ENDPOINT_PARAMS { typedef union _USB2_TT_ENDPOINT_PARAMS {
struct { struct {
ULONG TransferType : 4; ULONG TransferType : 4;