On Wed, 3 Sep 2014, Dylan Alex Simon wrote:
> Still no luck (it really is using the new module, even though it didn't
> rebuild the kernel). I should also mention this is gcc 4.9.1. I can rebuild
> with 4.8.3 if there's a reason to suspect that, though I haven't seen any
> other issues.
>
> [ 145.571979] thingm 0003:27B8:01ED.0004: hidraw3: USB HID v1.01 Device
> [ThingM blink(1) mk2] on usb-0000:00:12.2-3.1.4/input0
> [ 149.151153] BUG: unable to handle kernel paging request at ffffffffa00aa0cf
> [ 149.151246] IP:
> [ 149.151251] [<ffffffffa00aa0cf>] 0xffffffffa00aa0cf
> [ 149.151257] PGD 1814067 PUD 1815063 PMD 42ba9e067 PTE 0
> [ 149.151262] Oops: 0010 [#1] SMP
> [ 149.151273] Modules linked in: led_class cuse fuse snd_emu10k1 snd_hwdep
> snd_util_mem snd_ac97_codec ac97_bus snd_rawmidi snd_seq_device snd_pcm
> snd_timer ipt_ULOG [last unloaded: hid_thingm]
> [ 149.151279] CPU: 7 PID: 664 Comm: kworker/7:2 Not tainted
> 3.16.1-00001-g98fed6d-dirty #146
> [ 149.151280] Hardware name: empty empty/S8010-LE, BIOS 'V2.03B '
> 03/15/2012
> [ 149.151286] Workqueue: events 0xffffffffa00aa040
> [ 149.151288] task: ffff88042de12010 ti: ffff8800bb96c000 task.ti:
> ffff8800bb96c000
> [ 149.151294] RIP: 0010:[<ffffffffa00aa0cf>] [<ffffffffa00aa0cf>]
> 0xffffffffa00aa0cf
> [ 149.151296] RSP: 0018:ffff8800bb96fdd0 EFLAGS: 00010286
> [ 149.151298] RAX: 0000000000000009 RBX: ffff88042ba612f0 RCX:
> 0000000000000302
> [ 149.151300] RDX: 0000000000000049 RSI: 0000000000000286 RDI:
> ffff88042aa95d80
> [ 149.151302] RBP: ffff8800bb96fdf0 R08: ffff8804aaa95d80 R09:
> 0000000000000282
> [ 149.151303] R10: 000000716d515080 R11: 0000000000000026 R12:
> ffff88042d189940
> [ 149.151305] R13: 0000000000000000 R14: ffff88043edd4e00 R15:
> ffff88043edd13c0
> [ 149.151308] FS: 00007f383d7a3700(0000) GS:ffff88043edc0000(0000)
> knlGS:0000000000000000
> [ 149.151311] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 149.151315] CR2: ffffffffa00aa0cf CR3: 0000000001813000 CR4:
> 00000000000407e0
> [ 149.151316] Stack:
> [ 149.151321] 010000000000a000 0001000000000063 00000000f7ea6138
> ffff88042ba612f0
> [ 149.151325] ffff8800bb96fe38 ffffffff81052c2f ffff88043edd13c0
> 000000003edd13c0
> [ 149.151329] ffff88043edd13c0 ffff88043edd13e8 ffff88042de12010
> ffff88042d189970
> [ 149.151330] Call Trace:
> [ 149.151341] [<ffffffff81052c2f>] process_one_work+0x14f/0x400
> [ 149.151349] [<ffffffff81053423>] worker_thread+0x63/0x540
> [ 149.151354] [<ffffffff810533c0>] ? create_and_start_worker+0x60/0x60
> [ 149.151359] [<ffffffff81059038>] kthread+0xe8/0x100
> [ 149.151364] [<ffffffff81058f50>] ? kthread_create_on_node+0x1b0/0x1b0
> [ 149.151370] [<ffffffff815323ec>] ret_from_fork+0x7c/0xb0
> [ 149.151374] [<ffffffff81058f50>] ? kthread_create_on_node+0x1b0/0x1b0
Hrm, what we really want is to first destroy the LED interface, otherwise
someone might have re-queued the workqueue through thingm_led_set() after
it has been flushed / cancelled already.
Could you please give it one more shot with the patch below? Thanks for
your prompt testing.
diff --git a/drivers/hid/hid-thingm.c b/drivers/hid/hid-thingm.c
index 134be89..3d8cf5e 100644
--- a/drivers/hid/hid-thingm.c
+++ b/drivers/hid/hid-thingm.c
@@ -208,10 +208,10 @@ unregister_red:
static void thingm_remove_rgb(struct thingm_rgb *rgb)
{
- flush_work(&rgb->work);
led_classdev_unregister(&rgb->red.ldev);
led_classdev_unregister(&rgb->green.ldev);
led_classdev_unregister(&rgb->blue.ldev);
+ cancel_work_sync(&rgb->work);
}
static int thingm_probe(struct hid_device *hdev, const struct hid_device_id
*id)
@@ -286,10 +286,10 @@ static void thingm_remove(struct hid_device *hdev)
struct thingm_device *tdev = hid_get_drvdata(hdev);
int i;
+ hid_hw_stop(hdev);
+
for (i = 0; i < tdev->fwinfo->numrgb; ++i)
thingm_remove_rgb(tdev->rgb + i);
-
- hid_hw_stop(hdev);
}
static const struct hid_device_id thingm_table[] = {
--
Jiri Kosina
SUSE Labs
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