diff options
Diffstat (limited to 'OvmfPkg/VirtioRngDxe/VirtioRng.c')
-rw-r--r-- | OvmfPkg/VirtioRngDxe/VirtioRng.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/OvmfPkg/VirtioRngDxe/VirtioRng.c b/OvmfPkg/VirtioRngDxe/VirtioRng.c index 069aed1..8959e51 100644 --- a/OvmfPkg/VirtioRngDxe/VirtioRng.c +++ b/OvmfPkg/VirtioRngDxe/VirtioRng.c @@ -156,6 +156,11 @@ VirtioRngGetRNG ( }
Dev = VIRTIO_ENTROPY_SOURCE_FROM_RNG (This);
+ if (!Dev->Ready) {
+ DEBUG ((DEBUG_INFO, "%a: not ready\n", __func__));
+ return EFI_DEVICE_ERROR;
+ }
+
//
// Map Buffer's system physical address to device address
//
@@ -382,6 +387,7 @@ VirtioRngInit ( //
Dev->Rng.GetInfo = VirtioRngGetInfo;
Dev->Rng.GetRNG = VirtioRngGetRNG;
+ Dev->Ready = TRUE;
return EFI_SUCCESS;
@@ -414,8 +420,8 @@ VirtioRngUninit ( // VIRTIO_CFG_WRITE() returns, the host will have learned to stay away from
// the old comms area.
//
+ Dev->Ready = FALSE;
Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
-
Dev->VirtIo->UnmapSharedBuffer (Dev->VirtIo, Dev->RingMap);
VirtioRingUninit (Dev->VirtIo, &Dev->Ring);
@@ -435,7 +441,7 @@ VirtioRngExitBoot ( {
VIRTIO_RNG_DEV *Dev;
- DEBUG ((DEBUG_VERBOSE, "%a: Context=0x%p\n", __func__, Context));
+ DEBUG ((DEBUG_INFO, "%a: Context=0x%p\n", __func__, Context));
//
// Reset the device. This causes the hypervisor to forget about the virtio
// ring.
@@ -443,7 +449,8 @@ VirtioRngExitBoot ( // We allocated said ring in EfiBootServicesData type memory, and code
// executing after ExitBootServices() is permitted to overwrite it.
//
- Dev = Context;
+ Dev = Context;
+ Dev->Ready = FALSE;
Dev->VirtIo->SetDeviceStatus (Dev->VirtIo, 0);
}
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