[XEN RFC PATCH 01/40] tools: Fix -Werror=maybe-uninitialized for xlu_pci_parse_bdf

[Wei Chen <wei.chen@xxxxxxx>]

| libxlu_pci.c: In function 'xlu_pci_parse_bdf':
| libxlu_pci.c:32:18: error: 'func' may be used uninitialized in this function 
[-Werror=maybe-uninitialized]
|    32 |     pcidev->func = func;
|       |     ~~~~~~~~~~~~~^~~~~~
| libxlu_pci.c:51:29: note: 'func' was declared here
|    51 |     unsigned dom, bus, dev, func, vslot = 0;
|       |                             ^~~~
| libxlu_pci.c:31:17: error: 'dev' may be used uninitialized in this function 
[-Werror=maybe-uninitialized]
|    31 |     pcidev->dev = dev;
|       |     ~~~~~~~~~~~~^~~~~
| libxlu_pci.c:51:24: note: 'dev' was declared here
|    51 |     unsigned dom, bus, dev, func, vslot = 0;
|       |                        ^~~
| libxlu_pci.c:30:17: error: 'bus' may be used uninitialized in this function 
[-Werror=maybe-uninitialized]
|    30 |     pcidev->bus = bus;
|       |     ~~~~~~~~~~~~^~~~~
| libxlu_pci.c:51:19: note: 'bus' was declared here
|    51 |     unsigned dom, bus, dev, func, vslot = 0;
|       |                   ^~~
| libxlu_pci.c:78:26: error: 'dom' may be used uninitialized in this function 
[-Werror=maybe-uninitialized]
|    78 |                 if ( dom & ~0xff )
|       |                      ~~~~^~~~~~~

Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
---
 tools/libs/util/libxlu_pci.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/libs/util/libxlu_pci.c b/tools/libs/util/libxlu_pci.c
index 551d8e3aed..b38e9aab40 100644
--- a/tools/libs/util/libxlu_pci.c
+++ b/tools/libs/util/libxlu_pci.c
@@ -15,7 +15,7 @@ static int parse_bdf(libxl_device_pci *pci, const char *str, 
const char **endp)
 {
     const char *ptr = str;
     unsigned int colons = 0;
-    unsigned int domain, bus, dev, func;
+    unsigned int domain = 0, bus = 0, dev = 0, func = 0;
     int n;
 
     /* Count occurrences of ':' to detrmine presence/absence of the 'domain' */
@@ -28,7 +28,6 @@ static int parse_bdf(libxl_device_pci *pci, const char *str, 
const char **endp)
     ptr = str;
     switch (colons) {
     case 1:
-        domain = 0;
         if (sscanf(ptr, "%x:%x.%n", &bus, &dev, &n) != 2)
             return ERROR_INVAL;
         break;
-- 
2.25.1