Yossi Etigin e8224e4b80 IPoIB: Fix deadlock on RTNL between bcast join comp and ipoib_stop() ... Taking rtnl_lock in ipoib_mcast_join_complete() causes a deadlock with ipoib_stop(). We avoid it by scheduling the piece of code that takes the lock on ipoib_workqueue instead of executing it directly. This works because we only flush the ipoib_workqueue with the RTNL not held. The deadlock happens because ipoib_stop() calls ipoib_ib_dev_down() which calls ipoib_mcast_dev_flush(), which calls ipoib_mcast_free(), which calls ipoib_mcast_leave(). The latter calls ib_sa_free_multicast(), and this waits until the multicast completion handler finishes. This handler is ipoib_mcast_join_complete(), which waits for the rtnl_lock(), which was already taken by ipoib_stop(). This bug was introduced in commit a77a57a1 ("IPoIB: Fix deadlock on RTNL in ipoib_stop()"). Signed-off-by: Yossi Etigin <yosefe@voltaire.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>		2008-09-16 11:57:45 -07:00
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core	Merge branches 'cma', 'cxgb3', 'ipath', 'ipoib', 'mad' and 'mlx4' into for-linus	2008-08-07 14:12:03 -07:00
hw	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
ulp	IPoIB: Fix deadlock on RTNL between bcast join comp and ipoib_stop()	2008-09-16 11:57:45 -07:00
Kconfig	RDMA/nes: Add a driver for NetEffect RNICs	2008-02-04 20:20:45 -08:00
Makefile	RDMA/nes: Add a driver for NetEffect RNICs	2008-02-04 20:20:45 -08:00