[libvirt] [PATCH v2] qemu: fix return value issue

whether or not previous return value is -1, the following codes will be executed for a inactive guest in src/qemu/qemu_driver.c: ret = virDomainSaveConfig(driver->configDir, persistentDef); and if everything is okay, 'ret' is assigned to 0, the previous 'ret' will be overwritten, this patch will fix this issue. * src/qemu/qemu_driver.c: avoid return value is overwritten when give a argument in out of blkio weight range for a inactive guest. * how to reproduce? % virsh blkiotune ${guestname} --weight 10 % echo $? Note: guest must be inactive, argument 10 in out of blkio weight range, and can get a error information by checking libvirtd.log, however, virsh hasn't raised any error information, and return value is 0. https://bugzilla.redhat.com/show_bug.cgi?id=726304 Signed-off-by: Alex Jia <ajia(a)redhat.com&gt; --- src/qemu/qemu_driver.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index b673fd5..aaccddf 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -5688,7 +5688,9 @@ static int qemuDomainSetBlkioParameters(virDomainPtr dom, ret = -1; } } - ret = virDomainSaveConfig(driver->configDir, persistentDef); + + if (virDomainSaveConfig(driver->configDir, persistentDef) < 0) + ret = -1; } cleanup: -- 1.7.1