From: Toru UCHIYAMA <uchiyama.toru@jp.fujitsu.com>
To: netdev@vger.kernel.org
Subject: [PATCH]gianfar: gfar_remove needs to call unregister_netdev()
Date: Thu, 20 Aug 2009 22:54:35 +0900 [thread overview]
Message-ID: <4A8D559B.3030108@jp.fujitsu.com> (raw)
This patch solves the problem that the Oops(BUG_ON) occurs by rmmod.
# rmmod gianfar_driver
------------[ cut here ]------------
Kernel BUG at c01fec48 [verbose debug info unavailable]
Oops: Exception in kernel mode, sig: 5 [#1]
MPC837x MDS
Modules linked in: gianfar_driver(-) usb_storage scsi_wait_scan
NIP: c01fec48 LR: c01febf4 CTR: c01feba8
REGS: dec5bd60 TRAP: 0700 Tainted: G W (2.6.31-rc2)
MSR: 00029032 <EE,ME,CE,IR,DR> CR: 22000424 XER: 20000000
TASK = dec4cac0[1135] 'rmmod' THREAD: dec5a000
GPR00: 00000002 dec5be10 dec4cac0 dfba1820 c035d444 c035d478 ffffffff 00000000
GPR08: 0000002b 00000001 dfba193c 00000001 22000424 10019b34 1ffcb000 00000000
GPR16: 10012008 00000000 bf82ebe0 100017ec bf82ebec bf82ebe8 bf82ebd0 00000880
GPR24: 00000000 bf82ebf0 c03532f0 c03532e4 c036b594 dfba183c dfba1800 dfba1820
NIP [c01fec48] free_netdev+0xa0/0xb8
LR [c01febf4] free_netdev+0x4c/0xb8
Call Trace:
[dec5be10] [c01febf4] free_netdev+0x4c/0xb8 (unreliable)
[dec5be30] [e105f290] gfar_remove+0x50/0x68 [gianfar_driver]
[dec5be40] [c01ec534] of_platform_device_remove+0x30/0x44
[dec5be50] [c0181760] __device_release_driver+0x68/0xc8
[dec5be60] [c0181868] driver_detach+0xa8/0xac
[dec5be80] [c0180814] bus_remove_driver+0x9c/0xd8
[dec5bea0] [c0181efc] driver_unregister+0x60/0x98
[dec5beb0] [c01ec650] of_unregister_driver+0x14/0x24
[dec5bec0] [e10631bc] gfar_exit+0x18/0x4bc [gianfar_driver]
[dec5bed0] [c0047584] sys_delete_module+0x16c/0x228
[dec5bf40] [c00116bc] ret_from_syscall+0x0/0x38
--- Exception: c01 at 0xff3669c
LR = 0x10000f34
Instruction dump:
409e0024 a07e00c0 7c63f050 4be74429 80010024 bba10014 38210020 7c0803a6
4e800020 68000003 3160ffff 7d2b0110 <0f090000> 38000004 387e01f0 901e01d4
---[ end trace 8c595bcd37230a0f ]---
localhost kernel: ------------[ cut here ]------------
Signed-off-by: uchiyama.toru@jp.fujitsu.com
---
drivers/net/gianfar.c | 1 +
1 files changed, 1 insertion(+)
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index f8ffcbf..25f1ca4 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -491,6 +491,7 @@ static int gfar_remove(struct of_device *ofdev)
dev_set_drvdata(&ofdev->dev, NULL);
+ unregister_netdev(dev);
iounmap(priv->regs);
free_netdev(priv->ndev);
--
next reply other threads:[~2009-08-20 13:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-20 13:54 Toru UCHIYAMA [this message]
2009-08-31 5:04 ` [PATCH]gianfar: gfar_remove needs to call unregister_netdev() David Miller
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