Re: [libvirt PATCH 2/5] src: QemuMonitorCommandWithFiles: report error when fd passing is unsupported

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On Wed, May 18, 2022 at 04:00:57PM +0200, Ján Tomko wrote:
The result of the <= 0 comparison was assigned to 'rc', rendering the
if (rc == 0) condition dead code.

Signed-off-by: Ján Tomko <jtomko@xxxxxxxxxx>
---
src/libvirt-qemu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libvirt-qemu.c b/src/libvirt-qemu.c
index 5020b5dc1b..ace91e8ada 100644
--- a/src/libvirt-qemu.c
+++ b/src/libvirt-qemu.c
@@ -161,7 +161,7 @@ virDomainQemuMonitorCommandWithFiles(virDomainPtr domain,
    if (ninfiles > 0 || outfiles) {
        int rc;
        if ((rc = VIR_DRV_SUPPORTS_FEATURE(conn->driver, conn,
-                                           VIR_DRV_FEATURE_FD_PASSING) <= 0)) {
+                                           VIR_DRV_FEATURE_FD_PASSING)) <= 0) {
            if (rc == 0)
                virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                               _("fd passing is not supported by this connection"));
--
2.34.1


Or even (way) better:

diff --git i/src/libvirt-qemu.c w/src/libvirt-qemu.c
index 3cd8c8f7453d..93107d1bfcbb 100644
--- i/src/libvirt-qemu.c
+++ w/src/libvirt-qemu.c
@@ -159,9 +159,9 @@ virDomainQemuMonitorCommandWithFiles(virDomainPtr domain,
     virCheckNonNullArgGoto(cmd, error);

     if (ninfiles > 0 || outfiles) {
-        int rc;
-        if ((rc = VIR_DRV_SUPPORTS_FEATURE(conn->driver, conn,
-                                           VIR_DRV_FEATURE_FD_PASSING) <= 0)) {
+        int rc = VIR_DRV_SUPPORTS_FEATURE(conn->driver, conn,
+                                          VIR_DRV_FEATURE_FD_PASSING);
+        if (rc <= 0) {
             if (rc == 0)
                 virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                                _("fd passing is not supported by this connection"));
--

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