File c890c496-qemu-cleanup-virQEMUCapsFindBinaryForArch.patch of Package libvirt.26629

commit c890c4962f89b71fdfb7f06207e116e3ce16ba80
Author: Andrea Bolognani <abologna@redhat.com>
Date:   Thu Mar 31 10:56:55 2022 +0200

    qemu: Clean up virQEMUCapsFindBinaryForArch()
    
    If we get to the bottom of the function we know that none of the
    attempts to locate a QEMU binary has been successful, so we can
    simply return NULL directly.
    
    This makes it unnecessary variable used to store the path, for
    which we can use a more descriptive name.
    
    Lastly, comparing with NULL explicitly is somewhat uncommon in
    libvirt and more verbose than the equivalent implicit comparison,
    so get rid of it.
    
    Signed-off-by: Andrea Bolognani <abologna@redhat.com>
    Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
    Tested-by: Jim Fehlig <jfehlig@suse.com>

Index: libvirt-8.0.0/src/qemu/qemu_capabilities.c
===================================================================
--- libvirt-8.0.0.orig/src/qemu/qemu_capabilities.c
+++ libvirt-8.0.0/src/qemu/qemu_capabilities.c
@@ -877,7 +877,7 @@ static char *
 virQEMUCapsFindBinaryForArch(virArch hostarch,
                              virArch guestarch)
 {
-    char *ret = NULL;
+    char *binary;
     const char *archstr;
     virArch target;
 
@@ -886,24 +886,24 @@ virQEMUCapsFindBinaryForArch(virArch hos
      * to avoid using qemu-system-arm (and thus TCG) instead */
     if (hostarch == VIR_ARCH_AARCH64 && guestarch == VIR_ARCH_ARMV7L) {
         archstr = virQEMUCapsArchToString(hostarch);
-        if ((ret = virQEMUCapsFindBinary("qemu-system-%s", archstr)) != NULL)
-            return ret;
+        if ((binary = virQEMUCapsFindBinary("qemu-system-%s", archstr)))
+            return binary;
     }
 
     /* First attempt: try the guest architecture as it is */
     archstr = virQEMUCapsArchToString(guestarch);
-    if ((ret = virQEMUCapsFindBinary("qemu-system-%s", archstr)) != NULL)
-        return ret;
+    if ((binary = virQEMUCapsFindBinary("qemu-system-%s", archstr)))
+        return binary;
 
     /* Second attempt: try looking up by target instead */
     target = virQEMUCapsFindTarget(hostarch, guestarch);
     if (target != guestarch) {
         archstr = virQEMUCapsArchToString(target);
-        if ((ret = virQEMUCapsFindBinary("qemu-system-%s", archstr)) != NULL)
-            return ret;
+        if ((binary = virQEMUCapsFindBinary("qemu-system-%s", archstr)))
+            return binary;
     }
 
-    return ret;
+    return NULL;
 }