Date:	Fri, 10 Jun 2011 11:46:14 +0200
From:	Florian Fainelli <florian@...nwrt.org>
To:	Petr Štetiar <ynezz@...e.cz>
Cc:	netdev@...r.kernel.org, Herbert Valerio Riedel <hvr@....org>,
	Mika Westerberg <mika.westerberg@....fi>, davem@...emloft.net,
	hsweeten@...ionengravers.com, ryan@...ewatersys.com,
	Lennert Buytenhek <kernel@...tstofly.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] ep93xx-eth: convert to phylib

Hello Petr,

On Thursday 09 June 2011 22:30:59 Petr Štetiar wrote:
> Florian Fainelli <f.fainelli@...il.com> [2011-06-05 20:29:24]:
> > On Sunday 05 June 2011 19:57:36 Florian Fainelli wrote:
> > > ep93xx-eth lacked support for monitoring link status changes, with this
> > > patch, link changes are now watched and reported correctly.
> > > 
> > > Signed-off-by: Florian Fainelli <florian@...nwrt.org>
> > > ---
> > 
> > I just stumbled upon: http://www.mail-
> > archive.com/netdev@...r.kernel.org/msg62549.html
> > which does not seem to have been merged.
> > 
> > I will respin my patch with Herbert's changes
> 
> Hi,
> 
> just FYI, I wanted to test recent Mika's DMA/ep93xx_eth fixes, so I've
> added this patch also and it oopsed. If I revert this patch, it seems to
> work so far. You can find the whole patchset I've been testing on the
> GitHub[1]. I've tested it on ts-7250 and ts-7300, the oops is same. Here's
> the oops:

Allright, I need to respin the patch anyway, thanks for testing.

> 
> 	ep93xx-eth version 0.1 loading
> 	ep93xx_eth_mii: probed
> 	ep93xx_eth:ep93xx_mii_probe: no PHY found
> 	ep93xx-eth ep93xx-eth: failed to probe MII bus
> 	------------[ cut here ]------------
> 	WARNING: at net/core/dev.c:5133 rollback_registered_many+0x90/0x2d4()
> 	Modules linked in:
> 	Backtrace:
> 	[<c0027e78>] (dump_backtrace+0x0/0x10c) from [<c0263764>]
> (dump_stack+0x18/0x1c) r6:0000140d r5:c01cd558 r4:00000000 r3:00000000
> 	[<c026374c>] (dump_stack+0x0/0x1c) from [<c0037a48>]
> (warn_slowpath_common+0x50/0x68) [<c00379f8>]
> (warn_slowpath_common+0x0/0x68) from [<c0037a84>]
> (warn_slowpath_null+0x24/0x2c) r8:00100100 r7:00200200 r6:cf01bda0
> r5:cf01bdf8 r4:cf0b6800
> 	r3:00000009
> 	[<c0037a60>] (warn_slowpath_null+0x0/0x2c) from [<c01cd558>]
> (rollback_registered_many+0x90/0x2d4) [<c01cd4c8>]
> (rollback_registered_many+0x0/0x2d4) from [<c01cd834>]
> (rollback_registered+0x30/0x48) r8:00000027 r7:cf0b6800 r6:cf0b6b40
> r5:00000000 r4:cf0b6800
> 	r3:cf0b6858
> 	[<c01cd804>] (rollback_registered+0x0/0x48) from [<c01cd8a8>]
> (unregister_netdevice_queue+0x5c/0xa8) [<c01cd84c>]
> (unregister_netdevice_queue+0x0/0xa8) from [<c01cd914>]
> (unregister_netdev+0x20/0x28) r5:c030f638 r4:cf0b6800
> 	[<c01cd8f4>] (unregister_netdev+0x0/0x28) from [<c01b03a0>]
> (ep93xx_eth_remove+0x34/0x90) r4:cf0b6800 r3:cf039180
> 	[<c01b036c>] (ep93xx_eth_remove+0x0/0x90) from [<c01b1348>]
> (ep93xx_eth_probe+0x218/0x43c) r5:c030f630 r4:ffffffed
> 	[<c01b1130>] (ep93xx_eth_probe+0x0/0x43c) from [<c018b7b8>]
> (platform_drv_probe+0x1c/0x20) [<c018b79c>] (platform_drv_probe+0x0/0x20)
> from [<c018a5d0>] (driver_probe_device+0x8c/0x198) [<c018a544>]
> (driver_probe_device+0x0/0x198) from [<c018a770>]
> (__driver_attach+0x94/0x98) r8:c0017d40 r7:00000000 r6:c030f66c
> r5:c032080c r4:c030f638
> 	r3:00000000
> 	[<c018a6dc>] (__driver_attach+0x0/0x98) from [<c018974c>]
> (bus_for_each_dev+0x60/0x88) r6:00000000 r5:c018a6dc r4:c032080c
> r3:c018a6dc
> 	[<c01896ec>] (bus_for_each_dev+0x0/0x88) from [<c018a2a8>]
> (driver_attach+0x20/0x28) r6:cf0ae860 r5:c031d4e0 r4:c032080c
> 	[<c018a288>] (driver_attach+0x0/0x28) from [<c0189e94>]
> (bus_add_driver+0xa4/0x240) [<c0189df0>] (bus_add_driver+0x0/0x240) from
> [<c018aae0>] (driver_register+0x80/0x144) [<c018aa60>]
> (driver_register+0x0/0x144) from [<c018baf0>]
> (platform_driver_register+0x4c/0x60) r8:c0017d40 r7:00000000 r6:cf01a000
> r5:c0325960 r4:c001ee3c
> 	r3:00000000
> 	[<c018baa4>] (platform_driver_register+0x0/0x60) from [<c0017d5c>]
> (ep93xx_eth_init_module+0x1c/0x28) [<c0017d40>]
> (ep93xx_eth_init_module+0x0/0x28) from [<c00244f0>]
> (do_one_initcall+0x3c/0x17c) [<c00244b4>] (do_one_initcall+0x0/0x17c) from
> [<c0008a04>] (kernel_init+0x9c/0x140) [<c0008968>] (kernel_init+0x0/0x140)
> from [<c003b158>] (do_exit+0x0/0x710) r5:c0008968 r4:00000000
> 	---[ end trace edc3043606fef430 ]---
> 	network todo 'eth%d' but state 0
> 	Backtrace:
> 	[<c0027e78>] (dump_backtrace+0x0/0x10c) from [<c0263764>]
> (dump_stack+0x18/0x1c) r6:cf0b6b40 r5:c0312560 r4:cf0b6800 r3:00000000
> 	[<c026374c>] (dump_stack+0x0/0x1c) from [<c01d10e4>]
> (netdev_run_todo+0x2dc/0x33c) [<c01d0e08>] (netdev_run_todo+0x0/0x33c)
> from [<c01dd824>] (rtnl_unlock+0x10/0x14) [<c01dd814>]
> (rtnl_unlock+0x0/0x14) from [<c01cd918>] (unregister_netdev+0x24/0x28)
> [<c01cd8f4>] (unregister_netdev+0x0/0x28) from [<c01b03a0>]
> (ep93xx_eth_remove+0x34/0x90) r4:cf0b6800 r3:cf039180
> 	[<c01b036c>] (ep93xx_eth_remove+0x0/0x90) from [<c01b1348>]
> (ep93xx_eth_probe+0x218/0x43c) r5:c030f630 r4:ffffffed
> 	[<c01b1130>] (ep93xx_eth_probe+0x0/0x43c) from [<c018b7b8>]
> (platform_drv_probe+0x1c/0x20) [<c018b79c>] (platform_drv_probe+0x0/0x20)
> from [<c018a5d0>] (driver_probe_device+0x8c/0x198) [<c018a544>]
> (driver_probe_device+0x0/0x198) from [<c018a770>]
> (__driver_attach+0x94/0x98) r8:c0017d40 r7:00000000 r6:c030f66c
> r5:c032080c r4:c030f638
> 	r3:00000000
> 	[<c018a6dc>] (__driver_attach+0x0/0x98) from [<c018974c>]
> (bus_for_each_dev+0x60/0x88) r6:00000000 r5:c018a6dc r4:c032080c
> r3:c018a6dc
> 	[<c01896ec>] (bus_for_each_dev+0x0/0x88) from [<c018a2a8>]
> (driver_attach+0x20/0x28) r6:cf0ae860 r5:c031d4e0 r4:c032080c
> 	[<c018a288>] (driver_attach+0x0/0x28) from [<c0189e94>]
> (bus_add_driver+0xa4/0x240) [<c0189df0>] (bus_add_driver+0x0/0x240) from
> [<c018aae0>] (driver_register+0x80/0x144) [<c018aa60>]
> (driver_register+0x0/0x144) from [<c018baf0>]
> (platform_driver_register+0x4c/0x60) r8:c0017d40 r7:00000000 r6:cf01a000
> r5:c0325960 r4:c001ee3c
> 	r3:00000000
> 	[<c018baa4>] (platform_driver_register+0x0/0x60) from [<c0017d5c>]
> (ep93xx_eth_init_module+0x1c/0x28) [<c0017d40>]
> (ep93xx_eth_init_module+0x0/0x28) from [<c00244f0>]
> (do_one_initcall+0x3c/0x17c) [<c00244b4>] (do_one_initcall+0x0/0x17c) from
> [<c0008a04>] (kernel_init+0x9c/0x140) [<c0008968>] (kernel_init+0x0/0x140)
> from [<c003b158>] (do_exit+0x0/0x710) r5:c0008968 r4:00000000
> 	Unable to handle kernel NULL pointer dereference at virtual address
> 00000000 pgd = c0004000
> 	[00000000] *pgd=00000000
> 	Internal error: Oops: 5 [#1] PREEMPT
> 	Modules linked in:
> 	CPU: 0    Tainted: G        W    (3.0.0-rc2+ #35)
> 	PC is at ep93xx_free_buffers+0x24/0xd4
> 	LR is at ep93xx_eth_remove+0x5c/0x90
> 	pc : [<c01b02bc>]    lr : [<c01b03c8>]    psr: 80000013
> 	sp : cf01be20  ip : cf01be40  fp : cf01be3c
> 	r10: 00000080  r9 : c0325bc8  r8 : 00000027
> 	r7 : c030f638  r6 : cf0b6b40  r5 : cf0b6b54  r4 : 00000000
> 	r3 : 00000000  r2 : 00000014  r1 : 00000800  r0 : cf0b6b40
> 	Flags: Nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
> 	Control: c000717f  Table: 00004000  DAC: 00000017
> 	Process swapper (pid: 1, stack limit = 0xcf01a270)
> 	Stack: (0xcf01be20 to 0xcf01c000)
> 	be20: cf0b6800 cf0b6b40 cf0b6b40 cf0b6800 cf01be54 cf01be40 c01b03c8
> c01b02a8 be40: ffffffed c030f630 cf01be94 cf01be58 c01b1348 c01b037c
> 00000000 c032080c be60: c0017d40 c030f638 cf01be84 c030f638 c0340bd0
> c030f638 c032080c c0017d40 be80: 00000000 00000000 cf01bea4 cf01be98
> c018b7b8 c01b1140 cf01becc cf01bea8 bea0: c018a5d0 c018b7ac 00000000
> c030f638 c032080c c030f66c 00000000 c0017d40 bec0: cf01beec cf01bed0
> c018a770 c018a554 c018a6dc c032080c c018a6dc 00000000 bee0: cf01bf14
> cf01bef0 c018974c c018a6ec cf02ebf8 cf0391b0 c01576c4 c032080c bf00:
> c031d4e0 cf0ae860 cf01bf24 cf01bf18 c018a2a8 c01896fc cf01bf54 cf01bf28
> bf20: c0189e94 c018a298 c02ce24c cf01bf38 c032080c c0325960 cf01a000
> 00000000 bf40: c0017d40 00000000 cf01bf7c cf01bf58 c018aae0cf01bfe0
> c0008a04 c00244c4 bfe0: 00000000 c0008968 00000000 cf01bff8 c003b158
> c0008978 e3a0105e e3a02030 Backtrace:
> 	[<c01b0298>] (ep93xx_free_buffers+0x0/0xd4) from [<c01b03c8>]
> (ep93xx_eth_remove+0x5c/0x90) r7:cf0b6800 r6:cf0b6b40 r5:cf0b6b40
> r4:cf0b6800
> 	[<c01b036c>] (ep93xx_eth_remove+0x0/0x90) from [<c01b1348>]
> (ep93xx_eth_probe+0x218/0x43c) r5:c030f630 r4:ffffffed
> 	[<c01b1130>] (ep93xx_eth_probe+0x0/0x43c) from [<c018b7b8>]
> (platform_drv_probe+0x1c/0x20) [<c018b79c>] (platform_drv_probe+0x0/0x20)
> from [<c018a5d0>] (driver_probe_device+0x8c/0x198) [<c018a544>]
> (driver_probe_device+0x0/0x198) from [<c018a770>]
> (__driver_attach+0x94/0x98) r8:c0017d40 r7:00000000 r6:c030f66c
> r5:c032080c r4:c030f638
> 	r3:00000000
> 	[<c018a6dc>] (__driver_attach+0x0/0x98) from [<c018974c>]
> (bus_for_each_dev+0x60/0x88) r6:00000000 r5:c018a6dc r4:c032080c
> r3:c018a6dc
> 	[<c01896ec>] (bus_for_each_dev+0x0/0x88) from [<c018a2a8>]
> (driver_attach+0x20/0x28) r6:cf0ae860 r5:c031d4e0 r4:c032080c
> 	[<c018a288>] (driver_attach+0x0/0x28) from [<c0189e94>]
> (bus_add_driver+0xa4/0x240) [<c0189df0>] (bus_add_driver+0x0/0x240) from
> [<c018aae0>] (driver_register+0x80/0x144) [<c018aa60>]
> (driver_register+0x0/0x144) from [<c018baf0>]
> (platform_driver_register+0x4c/0x60) r8:c0017d40 r7:00000000 r6:cf01a000
> r5:c0325960 r4:c001ee3c
> 	r3:00000000
> 	[<c018baa4>] (platform_driver_register+0x0/0x60) from [<c0017d5c>]
> (ep93xx_eth_init_module+0x1c/0x28) [<c0017d40>]
> (ep93xx_eth_init_module+0x0/0x28) from [<c00244f0>]
> (do_one_initcall+0x3c/0x17c) [<c00244b4>] (do_one_initcall+0x0/0x17c) from
> [<c0008a04>] (kernel_init+0x9c/0x140) [<c0008968>] (kernel_init+0x0/0x140)
> from [<c003b158>] (do_exit+0x0/0x710) r5:c0008968 r4:00000000
> 	Code: e2805014 e3a04000 e5963010 e3a01b02 (e7933184)
> 	---[ end trace edc3043606fef431 ]---
> 	Kernel panic - not syncing: Attempted to kill init!
> 	Backtrace:
> 	[<c0027e78>] (dump_backtrace+0x0/0x10c) from [<c0263764>]
> (dump_stack+0x18/0x1c) r6:00000000 r5:c0312c40 r4:c0325cc0 r3:00000002
> 	[<c026374c>] (dump_stack+0x0/0x1c) from [<c02637d0>] (panic+0x68/0x198)
> 	[<c0263768>] (panic+0x0/0x198) from [<c003b7cc>] (do_exit+0x674/0x710)
> 	 r3:c0312c40 r2:c003b754 r1:cf01a000 r0:c02cf148
> 	 r7:cf019be0
> 	[<c003b158>] (do_exit+0x0/0x710) from [<c00284e4>] (die+  cf0b6b40
> 00000800 bde0: 00000014 00000000 00000000 cf0b6b54 cf0b6b40 c030f638
> 00000027 c0325bc8 be00: 00000080 cf01be3c cf01be40 cf01be20 c01b03c8
> c01b02bc 80000013 ffffffff r8:00000027 r7:c030f638 r6:cf0b6b40 r5:cf01be0c
> r4:ffffffff
> 	[<c01b0298>] (ep93xx_free_buffers+0x0/0xd4) from [<c01b03c8>]
> (ep93xx_eth_remove+0x5c/0x90) r7:cf0b6800 r6:cf0b6b40 r5:cf0b6b40
> r4:cf0b6800
> 	[<c01b036c>] (ep93xx_eth_remove+0x0/0x90) from [<c01b1348>]
> (ep93xx_eth_probe+0x218/0x43c) r5:c030f630 r4:ffffffed
> 	[<c01b1130>] (ep93xx_eth_probe+0x0/0x43c) from [<c018b7b8>]
> (platform_drv_probe+0x1c/0x20) [<c018b79c>] (platform_drv_probe+0x0/0x20)
> from [<c018a5d0>] (driver_probe_device+0x8c/0x198) [<c018a544>]
> (driver_probe_device+0x0/0x198) from [<c018a770>]
> (__driver_attach+0x94/0x98) r8:c0017d40 r7:00000000 r6:c030f66c
> r5:c032080c r4:c030f638
> 	r3:00000000
> 	[<c018a6dc>] (__driver_attach+0x0/0x98) from [<c018974c>]
> (bus_for_each_dev+0x60/0x88) r6:00000000 r5:c018a6dc r4:c032080c
> r3:c018a6dc
> 	[<c01896ec>] (bus_for_each_dev+0x0/0x88) from [<c018a2a8>]
> (driver_attach+0x20/0x28) r6:cf0ae860 r5:c031d4e0 r4:c032080c
> 	[<c018a288>] (driver_attach+0x0/0x28) from [<c0189e94>]
> (bus_add_driver+0xa4/0x240) [<c0189df0>] (bus_add_driver+0x0/0x240) from
> [<c018aae0>] (driver_register+0x80/0x144) [<c018aa60>]
> (driver_register+0x0/0x144) from [<c018baf0>]
> (platform_driver_register+0x4c/0x60) r8:c0017d40 r7:00000000 r6:cf01a000
> r5:c0325960 r4:c001ee3c
> 	r3:00000000
> 	[<c018baa4>] (platform_driver_register+0x0/0x60) from [<c0017d5c>]
> (ep93xx_eth_init_module+0x1c/0x28) [<c0017d40>]
> (ep93xx_eth_init_module+0x0/0x28) from [<c00244f0>]
> (do_one_initcall+0x3c/0x17c) [<c00244b4>] (do_one_initcall+0x0/0x17c) from
> [<c0008a04>] (kernel_init+0x9c/0x140) [<c0008968>] (kernel_init+0x0/0x140)
> from [<c003b158>] (do_exit+0x0/0x710) r5:c0008968 r4:00000000
> 
> 1. https://github.com/ynezz/linux-2.6/commits/ts72xx-wip
> 
> -- ynezz

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