tree 608230959790644dd22c1e6f81c812d497169b09
parent 3933fc952a5a5af4cf23fca94e20203251c9d825
author Dongdong Deng <dongdong.deng@windriver.com> 1253117447 +0000
committer David S. Miller <davem@davemloft.net> 1253159387 -0700

b44: the poll handler b44_poll must not enable IRQ unconditionally

net/core/netpoll.c::netpoll_send_skb() calls the poll handler when
it is available. As netconsole can be used from almost any context,
IRQ must not be enabled blindly in the NAPI handler of the driver
which supports netpoll.

Call trace:
netpoll_send_skb()
{
local_irq_save(flags)
  -> netpoll_poll()
    -> poll_napi()
      -> poll_one_napi()
        -> napi->poll()
            -> b44_poll()
local_irq_restore(flags)
}

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>