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[PATCH 4/5] gqa-win: get_pci_info: Replace 'while' with 2 calls of the f
From: |
Kostiantyn Kostiuk |
Subject: |
[PATCH 4/5] gqa-win: get_pci_info: Replace 'while' with 2 calls of the function |
Date: |
Mon, 13 Dec 2021 13:15:53 +0200 |
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 <kkostiuk@redhat.com>
Signed-off-by: Kostiantyn Kostiuk <konstantin@daynix.com>
---
qga/commands-win32.c | 30 ++++++++++++++++++++++++------
1 file changed, 24 insertions(+), 6 deletions(-)
diff --git a/qga/commands-win32.c b/qga/commands-win32.c
index cef14a8762..6bde5260e8 100644
--- a/qga/commands-win32.c
+++ b/qga/commands-win32.c
@@ -552,10 +552,10 @@ 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 =
@@ -567,6 +567,16 @@ 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 cleanup;
+ }
+
dev_file = CreateFile(pdev_iface_detail_data->DevicePath, 0,
FILE_SHARE_READ, NULL, OPEN_EXISTING, 0,
NULL);
@@ -597,8 +607,8 @@ 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 {
@@ -608,6 +618,14 @@ 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 cleanup;
+ }
+
/*
* CM API used here as opposed to
* SetupDiGetDeviceProperty(..., DEVPKEY_Device_Parent, ...)
--
2.25.1