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[UMPNPMGR] PNP_CreateDevInst: A phantom device can only be created if the device did not exist before

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This commit is contained in:
Eric Kohl 2022-04-19 00:09:27 +02:00
parent 2c391b1eab
commit f3ac86713d
1 changed files with 15 additions and 0 deletions
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15
base/services/umpnpmgr/rpcserver.c
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@ -3052,6 +3052,7 @@ PNP_CreateDevInst(
PNP_RPC_STRING_LEN ulLength,
DWORD ulFlags)
{
HKEY hKey = NULL;
CONFIGRET ret = CR_SUCCESS;
DPRINT("PNP_CreateDevInst(%p %S %S %lu 0x%08lx)\n",
@ -3075,8 +3076,18 @@ PNP_CreateDevInst(
return ret;
}
/* Try to open the device instance key */
RegOpenKeyEx(hEnumKey, pszDeviceID, 0, KEY_READ | KEY_WRITE, &hKey);
if (ulFlags & CM_CREATE_DEVNODE_PHANTOM)
{
/* Fail, if the device already exists */
if (hKey != NULL)
{
ret = CR_ALREADY_SUCH_DEVINST;
goto done;
}
/* Create the phantom device instance */
ret = CreateDeviceInstance(pszDeviceID, TRUE);
}
@ -3086,6 +3097,10 @@ PNP_CreateDevInst(
ret = CreateDeviceInstance(pszDeviceID, FALSE);
}
done:
if (hKey)
RegCloseKey(hKey);
DPRINT("PNP_CreateDevInst() done (returns %lx)\n", ret);
return ret;