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OvmfPkg: VirtioBlkDriverBindingStop: fix incorrect use of UEFI driver model 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13866 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten 2012-10-18 17:07:24 +00:00
parent 74418fe963
commit c8c2e4d613
1 changed files with 20 additions and 6 deletions
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26
OvmfPkg/VirtioBlkDxe/VirtioBlk.c
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@ -944,18 +944,32 @@ VirtioBlkDriverBindingStop (
IN EFI_HANDLE *ChildHandleBuffer
)
{
VBLK_DEV *Dev;
EFI_STATUS Status;
EFI_STATUS Status;
EFI_BLOCK_IO_PROTOCOL *BlockIo;
VBLK_DEV *Dev;
Dev = VIRTIO_BLK_FROM_BLOCK_IO (This);
Status = gBS->OpenProtocol (
DeviceHandle, // candidate device
&gEfiBlockIoProtocolGuid, // retrieve the BlockIo iface
(VOID **)&BlockIo, // target pointer
This->DriverBindingHandle, // requestor driver identity
DeviceHandle, // requesting lookup for dev.
EFI_OPEN_PROTOCOL_GET_PROTOCOL // lookup only, no ref. added
);
if (EFI_ERROR (Status)) {
return Status;
}
Dev = VIRTIO_BLK_FROM_BLOCK_IO (BlockIo);
//
// If DriverBindingStop() is called with the driver instance still in use,
// or any of the parameters are invalid, we've caught a bug.
// Handle Stop() requests for in-use driver instances gracefully.
//
Status = gBS->UninstallProtocolInterface (DeviceHandle,
&gEfiBlockIoProtocolGuid, &Dev->BlockIo);
ASSERT (Status == EFI_SUCCESS);
if (EFI_ERROR (Status)) {
return Status;
}
VirtioBlkUninit (Dev);