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Arjan van de Ven
6abd219c6e
reported by Jure Repinc: > > http://bugzilla.kernel.org/show_bug.cgi?id=6773 > > checked out dmesg output and found the message > > > > ====================================================== > > [ BUG: hard-safe -> hard-unsafe lock order detected! ] > > ------------------------------------------------------ > > > > starting at line 660 of the dmesg.txt that I will attach. The patch below should fix the deadlock, albeit I suspect it's not the "right" fix; the right fix may well be to move the rx processing in bcm43xx to softirq context. [it's debatable, ipw2200 hit this exact same bug; at some point it's better to bite the bullet and move this to the common layer as my patch below does] Make the nl_table_lock irq-safe; it's taken for read in various netlink functions, including functions that several wireless drivers (ipw2200, bcm43xx) want to call from hardirq context. The deadlock was found by the lock validator. Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> Signed-off-by: Herbert Xu <[email protected]> Cc: Michael Buesch <[email protected]> Cc: "John W. Linville" <[email protected]> Cc: Jeff Garzik <[email protected]> Acked-by: "David S. Miller" <[email protected]> Cc: jamal <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>