From: Alexander Aring <alex.aring-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: alex.bluesman.smirnov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-zigbee-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: [PATCH net] at86rf230: mask irq's before deregister device
Date: Mon, 31 Mar 2014 03:26:51 +0200 [thread overview]
Message-ID: <1396229211-9146-1-git-send-email-alex.aring@gmail.com> (raw)
While transmit over a at86rf231 device and unloading the module I got:
[ 29.643073] WARNING: CPU: 0 PID: 3 at kernel/workqueue.c:1335 __queue_work+0xb4/0x224()
[ 29.651457] Modules linked in: at86rf230(-) autofs4
[ 29.656612] CPU: 0 PID: 3 Comm: ksoftirqd/0 Tainted: G W 3.14.0-rc6-01602-g902659e-dirty #294
[ 29.666490] [<c00124f0>] (unwind_backtrace) from [<c0010ad0>] (show_stack+0x10/0x14)
[ 29.674628] [<c0010ad0>] (show_stack) from [<c0032c80>] (warn_slowpath_common+0x60/0x80)
[ 29.683116] [<c0032c80>] (warn_slowpath_common) from [<c0032d30>] (warn_slowpath_null+0x18/0x20)
[ 29.692329] [<c0032d30>] (warn_slowpath_null) from [<c0045b08>] (__queue_work+0xb4/0x224)
[ 29.700906] [<c0045b08>] (__queue_work) from [<c0045cc8>] (queue_work_on+0x50/0x78)
[ 29.708944] [<c0045cc8>] (queue_work_on) from [<c05669cc>] (mac802154_tx+0x1e4/0x240)
[ 29.717164] [<c05669cc>] (mac802154_tx) from [<c0471814>] (dev_hard_start_xmit+0x2f0/0x43c)
[ 29.725926] [<c0471814>] (dev_hard_start_xmit) from [<c04878d0>] (sch_direct_xmit+0x64/0x2a0)
[ 29.734867] [<c04878d0>] (sch_direct_xmit) from [<c0487c38>] (__qdisc_run+0x12c/0x18c)
[ 29.743169] [<c0487c38>] (__qdisc_run) from [<c046e1b0>] (net_tx_action+0xe0/0x178)
[ 29.751205] [<c046e1b0>] (net_tx_action) from [<c0036690>] (__do_softirq+0x100/0x264)
[ 29.759420] [<c0036690>] (__do_softirq) from [<c0036818>] (run_ksoftirqd+0x24/0x4c)
[ 29.767453] [<c0036818>] (run_ksoftirqd) from [<c005232c>] (smpboot_thread_fn+0x128/0x13c)
[ 29.776121] [<c005232c>] (smpboot_thread_fn) from [<c004c3fc>] (kthread+0xd0/0xe4)
[ 29.784061] [<c004c3fc>] (kthread) from [<c000da88>] (ret_from_fork+0x14/0x2c)
[ 29.791628] ---[ end trace 3406ff24bd973834 ]---
The problem is there are still interrupts after deregister ieee802154
device. This patch mask all interrupts in the at86rf2xx chips before
deregister the device.
Signed-off-by: Alexander Aring <alex.aring-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
drivers/net/ieee802154/at86rf230.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/net/ieee802154/at86rf230.c b/drivers/net/ieee802154/at86rf230.c
index a30258a..fbb83d1 100644
--- a/drivers/net/ieee802154/at86rf230.c
+++ b/drivers/net/ieee802154/at86rf230.c
@@ -997,6 +997,8 @@ static int at86rf230_remove(struct spi_device *spi)
{
struct at86rf230_local *lp = spi_get_drvdata(spi);
+ /* mask all at86rf230 irq's */
+ at86rf230_write_subreg(lp, SR_IRQ_MASK, 0);
ieee802154_unregister_device(lp->dev);
free_irq(spi->irq, lp);
--
1.9.1
------------------------------------------------------------------------------
next reply other threads:[~2014-03-31 1:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-31 1:26 Alexander Aring [this message]
2014-03-31 20:43 ` [PATCH net] at86rf230: mask irq's before deregister device David Miller
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