[PATCH v2 07/20] node_device_udev: Don't take `mdevctlLock` for `mdevctl list` and add comments about locking

Commit a99d876a0f58 ("node_device: Use automatic mutex management") replaced the locking mechanism and accidentally removed the comment with the reason why the lock is taken. The reason was to "ensure only a single thread can query mdevctl at a time", but this reason is no longer valid or maybe it never was. Therefore, let's remove this lock and add a comment to `mdevCtl` what it protects. Reviewed-by: Jonathon Jongsma <jjongsma(a)redhat.com&gt; Reviewed-by: Boris Fiuczynski <fiuczy(a)linux.ibm.com&gt; Signed-off-by: Marc Hartmayer <mhartmay(a)linux.ibm.com&gt; --- src/node_device/node_device_udev.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/src/node_device/node_device_udev.c b/src/node_device/node_device_udev.c index 616f98885a60..c2e6c593709b 100644 --- a/src/node_device/node_device_udev.c +++ b/src/node_device/node_device_udev.c @@ -72,8 +72,9 @@ struct _udevEventData { /* init thread */ virThread *initThread; - GList *mdevctlMonitors; + /* Protects @mdevctlMonitors */ virMutex mdevctlLock; + GList *mdevctlMonitors; int mdevctlTimeout; }; @@ -2069,9 +2070,6 @@ udevPCITranslateInit(bool privileged G_GNUC_UNUSED) static void mdevctlUpdateThreadFunc(void *opaque G_GNUC_UNUSED) { - udevEventData *priv = driver->privateData; - VIR_LOCK_GUARD lock = virLockGuardLock(&priv->mdevctlLock); - if (nodeDeviceUpdateMediatedDevices() < 0) VIR_WARN("mdevctl failed to update mediated devices"); } -- 2.34.1