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qemu: fix return value issue

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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@redhat.com>
This commit is contained in:
Alex Jia 2011-08-01 23:45:27 +08:00 committed by Eric Blake
parent 868453db1e
commit c03f7f1358
1 changed files with 3 additions and 1 deletions
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4
src/qemu/qemu_driver.c
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@ -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: