[PPPOL2TP]: Make locking calls softirq-safe

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Fix locking issues in the pppol2tp driver which can cause a kernel
crash on SMP boxes. There were two problems:-

1. The driver was violating read_lock() and write_lock() scheduling
   rules because it wasn't using softirq-safe locks in softirq
   contexts. So we now consistently use the _bh variants of the lock
   functions.

2. The driver was calling sk_dst_get() in pppol2tp_xmit() which was
   taking sk_dst_lock in softirq context. We now call __sk_dst_get().

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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James Chapman 2008-03-05 18:39:08 -08:00 • committed by David S. Miller

parent 5a346a10c0

commit cf3752e2d2

1 changed files with 29 additions and 29 deletions

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drivers/net/pppol2tp.c

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