MdeModulePkg/XhciDxe: Event Ring traverse algorithm enhancement to avoid that those...

[mirror_edk2.git] / MdeModulePkg / Bus / Usb / UsbBusDxe / UsbDesc.c

diff --git a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c
index cb892e3ebca3c96d5916d007d2f1525395e88337..529b136188ace95104d6dfb9e069e0c9b202c165 100644 (file)
--- a/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c
+++ b/MdeModulePkg/Bus/Usb/UsbBusDxe/UsbDesc.c
@@ -359,7 +359,7 @@ UsbParseConfigDesc (
   while (Len >= sizeof (EFI_USB_INTERFACE_DESCRIPTOR)) {\r
     Setting = UsbParseInterfaceDesc (DescBuf, Len, &Consumed);\r
 \r
-    if ((Setting == NULL)) {\r
+    if (Setting == NULL) {\r
       DEBUG (( EFI_D_ERROR, "UsbParseConfigDesc: failed to parse interface setting\n"));\r
       goto ON_ERROR;\r
 \r
@@ -527,12 +527,14 @@ UsbGetMaxPacketSize0 (
   // Get the first 8 bytes of the device descriptor which contains\r
   // max packet size for endpoint 0, which is at least 8.\r
   //\r
-  UsbDev->MaxPacket0 = 8;\r
-\r
   for (Index = 0; Index < 3; Index++) {\r
     Status = UsbCtrlGetDesc (UsbDev, USB_DESC_TYPE_DEVICE, 0, 0, &DevDesc, 8);\r
 \r
     if (!EFI_ERROR (Status)) {\r
+      if ((DevDesc.BcdUSB == 0x0300) && (DevDesc.MaxPacketSize0 == 9)) {\r
+        UsbDev->MaxPacket0 = 1 << 9;\r
+        return EFI_SUCCESS;\r
+      }\r
       UsbDev->MaxPacket0 = DevDesc.MaxPacketSize0;\r
       return EFI_SUCCESS;\r
     }\r