Author: sbruno
Date: Thu Jul 16 16:32:57 2015
New Revision: 285639
URL: https://svnweb.freebsd.org/changeset/base/285639
Log:
Add an adapter CORE lock in the DDB hook em_dump_queue to avoid WITNESS
panic in em_init_locked() while debugging.
MFC after: 2 weeks
Sponsored by: Limelight Networks
Modified:
head/sys/dev/e1000/if_em.c
Modified: head/sys/dev/e1000/if_em.c
==============================================================================
--- head/sys/dev/e1000/if_em.c Thu Jul 16 16:08:40 2015 (r285638)
+++ head/sys/dev/e1000/if_em.c Thu Jul 16 16:32:57 2015 (r285639)
@@ -5998,7 +5998,9 @@ DB_COMMAND(em_reset_dev, em_ddb_reset_de
dev = devclass_get_device(dc, index);
if (device_get_driver(dev) == &em_driver) {
struct adapter *adapter = device_get_softc(dev);
+ EM_CORE_LOCK(adapter);
em_init_locked(adapter);
+ EM_CORE_UNLOCK(adapter);
}
}
}
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