With the hyperv driver, disks might have windows paths like
"c:\path\to\disk.vhdx". Currently, this function supports paths, but
only if they're in unix format.

Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com>
---
 src/conf/domain_conf.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 453e301041..a77670ea8d 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -15459,10 +15459,12 @@ virDomainDiskIndexByName(virDomainDef *def, const char *name,
     /* We prefer the <target dev='name'/> name (it's shorter, required
      * for all disks, and should be unambiguous), but also support
      * <source file='name'/> (if unambiguous).  Assume dst if there is
-     * no leading slash, source name otherwise.  */
+     * no leading slash (Unix path) or drive letter (Windows path like C:\),
+     * source name otherwise.  */
     for (i = 0; i < def->ndisks; i++) {
         vdisk = def->disks[i];
-        if (*name != '/') {
+        if (*name != '/' &&
+            !(g_ascii_isalpha(name[0]) && name[1] == ':')) {
             if (STREQ(vdisk->dst, name))
                 return i;
         } else if (STREQ_NULLABLE(virDomainDiskGetSource(vdisk), name)) {
-- 
2.53.0