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gqa-win: get_pci_info: Replace 'while' with 2 calls of the function

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Microsoft suggests this solution in the documentation:
https://docs.microsoft.com/en-us/windows/win32/api/setupapi/nf-setupapi-setupdigetdeviceinterfacedetaila

Signed-off-by: Kostiantyn Kostiuk <konstantin@daynix.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Kostiantyn Kostiuk <kkostiuk@redhat.com>
This commit is contained in:
Kostiantyn Kostiuk 2021-12-08 12:14:32 +00:00
parent 5f22473ebb
commit d919cea07c
1 changed files with 24 additions and 6 deletions
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30
qga/commands-win32.c
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@ -636,10 +636,10 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
if (SetupDiEnumDeviceInterfaces(dev_info, &dev_info_data,
&GUID_DEVINTERFACE_DISK, 0,
&dev_iface_data)) {
while (!SetupDiGetDeviceInterfaceDetail(dev_info, &dev_iface_data,
pdev_iface_detail_data,
size, &size,
&dev_info_data)) {
if (!SetupDiGetDeviceInterfaceDetail(dev_info, &dev_iface_data,
pdev_iface_detail_data,
size, &size,
&dev_info_data)) {
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
pdev_iface_detail_data = g_malloc(size);
pdev_iface_detail_data->cbSize =
@ -651,6 +651,16 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
}
}
if (!SetupDiGetDeviceInterfaceDetail(dev_info, &dev_iface_data,
pdev_iface_detail_data,
size, &size,
&dev_info_data)) {
// pdev_iface_detail_data already is allocated
error_setg_win32(errp, GetLastError(),
"failed to get device interfaces");
goto end;
}
dev_file = CreateFile(pdev_iface_detail_data->DevicePath, 0,
FILE_SHARE_READ, NULL, OPEN_EXISTING, 0,
NULL);
@ -680,8 +690,8 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
ULONG dev_id_size = 0;
size = 0;
while (!SetupDiGetDeviceInstanceId(dev_info, &dev_info_data,
parent_dev_id, size, &size)) {
if (!SetupDiGetDeviceInstanceId(dev_info, &dev_info_data,
parent_dev_id, size, &size)) {
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
parent_dev_id = g_malloc(size);
} else {
@ -691,6 +701,14 @@ static GuestPCIAddress *get_pci_info(int number, Error **errp)
}
}
if (!SetupDiGetDeviceInstanceId(dev_info, &dev_info_data,
parent_dev_id, size, &size)) {
// parent_dev_id already is allocated
error_setg_win32(errp, GetLastError(),
"failed to get device instance ID");
goto end;
}
/*
* CM API used here as opposed to
* SetupDiGetDeviceProperty(..., DEVPKEY_Device_Parent, ...)