diff options
Diffstat (limited to 'MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c')
| -rw-r--r-- | MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c index 00108b87e2..36ce1bd4fe 100644 --- a/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c +++ b/MdeModulePkg/Bus/Pci/UhciDxe/Uhci.c @@ -2068,6 +2068,7 @@ UhciCleanDevUp ( )
{
USB_HC_DEV *Uhc;
+ UINT64 Supports;
//
// Uninstall the USB_HC and USB_HC2 protocol, then disable the controller
@@ -2089,11 +2090,18 @@ UhciCleanDevUp ( UhciFreeAllAsyncReq (Uhc);
UhciDestoryFrameList (Uhc);
-
+
+ Uhc->PciIo->Attributes (
+ Uhc->PciIo,
+ EfiPciIoAttributeOperationSupported,
+ 0,
+ &Supports
+ );
+ Supports &= EFI_PCI_DEVICE_ENABLE;
Uhc->PciIo->Attributes (
Uhc->PciIo,
EfiPciIoAttributeOperationDisable,
- EFI_PCI_DEVICE_ENABLE,
+ Supports,
NULL
);
@@ -2126,6 +2134,7 @@ UhciDriverBindingStart ( EFI_STATUS Status;
EFI_PCI_IO_PROTOCOL *PciIo;
USB_HC_DEV *Uhc;
+ UINT64 Supports;
//
// Open PCIIO, then enable the EHC device and turn off emulation
@@ -2148,10 +2157,19 @@ UhciDriverBindingStart ( Status = PciIo->Attributes (
PciIo,
- EfiPciIoAttributeOperationEnable,
- EFI_PCI_DEVICE_ENABLE,
- NULL
+ EfiPciIoAttributeOperationSupported,
+ 0,
+ &Supports
);
+ if (!EFI_ERROR (Status)) {
+ Supports &= EFI_PCI_DEVICE_ENABLE;
+ Status = PciIo->Attributes (
+ PciIo,
+ EfiPciIoAttributeOperationEnable,
+ Supports,
+ NULL
+ );
+ }
if (EFI_ERROR (Status)) {
goto CLOSE_PCIIO;
|