netdev - Re: Regression in next for smsc911x with tigthen lockdep checks

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Message-ID: <20160420150256.GG5995@atomide.com>
Date:	Wed, 20 Apr 2016 08:02:56 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	"David S. Miller" <davem@...emloft.net>
Cc:	netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-omap@...r.kernel.org,
	Steve Glendinning <steve.glendinning@...well.net>
Subject: Re: Regression in next for smsc911x with tigthen lockdep checks

* Tony Lindgren <tony@...mide.com> [160420 08:02]:
> Hi,
> 
> Looks like commit fafc4e1ea1a4 ("sock: tigthen lockdep checks for
> sock_owned_by_user") in next causes a regression at least for
> smsc911x with CONFIG_LOCKDEP. It keeps spamming with the following
> message. Any ideas?

Sorry forgot to add Steve to Cc, added now.

> Regards,
> 
> Tony
> 
> 8< ----------------
> WARNING: CPU: 0 PID: 0 at include/net/sock.h:1408 udp_queue_rcv_skb+0x398/0x640
> Modules linked in:
> CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.6.0-rc4-next-20160420 #1087
> Hardware name: Generic OMAP36xx (Flattened Device Tree)
> [<c01103c8>] (unwind_backtrace) from [<c010c400>] (show_stack+0x10/0x14)
> [<c010c400>] (show_stack) from [<c04813ec>] (dump_stack+0xb0/0xe4)
> [<c04813ec>] (dump_stack) from [<c0137afc>] (__warn+0xd8/0x104)
> [<c0137afc>] (__warn) from [<c0137bd8>] (warn_slowpath_null+0x20/0x28)
> [<c0137bd8>] (warn_slowpath_null) from [<c06d5310>] (udp_queue_rcv_skb+0x398/0x640)
> [<c06d5310>] (udp_queue_rcv_skb) from [<c06d5a84>] (__udp4_lib_rcv+0x4cc/0xc0c)
> [<c06d5a84>] (__udp4_lib_rcv) from [<c069e980>] (ip_local_deliver_finish+0xcc/0x4f4)
> [<c069e980>] (ip_local_deliver_finish) from [<c069f748>] (ip_local_deliver+0xcc/0xd8)
> [<c069f748>] (ip_local_deliver) from [<c069ee64>] (ip_rcv_finish+0xbc/0x700)
> [<c069ee64>] (ip_rcv_finish) from [<c069fbe0>] (ip_rcv+0x48c/0x6d4)
> [<c069fbe0>] (ip_rcv) from [<c0662790>] (__netif_receive_skb_core+0x380/0xa10)
> [<c0662790>] (__netif_receive_skb_core) from [<c0665138>] (netif_receive_skb_internal+
> 0x74/0x1ec)
> [<c0665138>] (netif_receive_skb_internal) from [<c05da394>] (smsc911x_poll+0xd8/0x228)
> [<c05da394>] (smsc911x_poll) from [<c0665cd0>] (net_rx_action+0x124/0x470)
> [<c0665cd0>] (net_rx_action) from [<c013e114>] (__do_softirq+0xc8/0x54c)
> [<c013e114>] (__do_softirq) from [<c013e8b8>] (irq_exit+0xbc/0x130)
> [<c013e8b8>] (irq_exit) from [<c019c8c8>] (__handle_domain_irq+0x6c/0xdc)
> [<c019c8c8>] (__handle_domain_irq) from [<c07af2b8>] (__irq_svc+0x58/0x78)
> [<c07af2b8>] (__irq_svc) from [<c0603884>] (cpuidle_enter_state+0xc4/0x3d4)
> [<c0603884>] (cpuidle_enter_state) from [<c0183be0>] (cpu_startup_entry+0x198/0x3a0)
> [<c0183be0>] (cpu_startup_entry) from [<c0b00c08>] (start_kernel+0x350/0x3c8)
> [<c0b00c08>] (start_kernel) from [<8000807c>] (0x8000807c)
> --
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