From: Wei Yongjun Date: Wed, 28 Apr 2010 08:47:18 +0000 (+0000) Subject: sctp: avoid irq lock inversion while call sk->sk_data_ready() X-Git-Tag: v2.6.34-rc6~13^2~7 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=561b1733a465cf9677356b40c27653dd45f1ac56;p=pandora-kernel.git sctp: avoid irq lock inversion while call sk->sk_data_ready() sk->sk_data_ready() of sctp socket can be called from both BH and non-BH contexts, but the default sk->sk_data_ready(), sock_def_readable(), can not be used in this case. Therefore, we have to make a new function sctp_data_ready() to grab sk->sk_data_ready() with BH disabling. ========================================================= [ INFO: possible irq lock inversion dependency detected ] 2.6.33-rc6 #129 --------------------------------------------------------- sctp_darn/1517 just changed the state of lock: (clock-AF_INET){++.?..}, at: [] sock_def_readable+0x20/0x80 but this lock took another, SOFTIRQ-unsafe lock in the past: (slock-AF_INET){+.-...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: 1 lock held by sctp_darn/1517: #0: (sk_lock-AF_INET){+.+.+.}, at: [] sctp_sendmsg+0x23d/0xc00 [sctp] Signed-off-by: Wei Yongjun Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- Reading git-diff-tree failed