Re: commit 554f76962d3a6eb5110415f1591aca83f96a84ae hangs USB for vmware 7.0.1

[Oliver Neukum]

Am Samstag, 6. März 2010 10:33:07 schrieb Dmitry Torokhov:
> I did not have issues with bringing VMware GUI with
> 64096c17417380d8a472d096645f4cbc9406c987 as tip of Linus's tree (which
> is a believe the latest published), but got the following traces when
> yanked USB keyboard out:
> 
> [ 1784.954389] usb 5-1: USB disconnect, address 2
> [ 1784.954394] usb 5-1.3: USB disconnect, address 3
> [ 1920.558046] INFO: task khubd:27 blocked for more than 120 seconds.
> [ 1920.558051] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> [ 1920.558054] khubd         D 0000000000000202     0    27      2 0x00000000
> [ 1920.558060]  ffff88011ba29960 0000000000000046 ffff88000260eec0 ffff88011ba20000
> [ 1920.558067]  ffff88011ba28000 ffff88011ba29fd8 ffff88011ba29fd8 ffff88011ba20000
> [ 1920.558073]  ffff88011ba29fd8 0000000000013d80 0000000000013d80 0000000000013d80
> [ 1920.558079] Call Trace:
> [ 1920.558088]  [<ffffffff81478591>] __mutex_lock_common+0x1a1/0x4a0
> [ 1920.558094]  [<ffffffff8136f922>] ? usbfs_conn_disc_event+0x12/0x40
> [ 1920.558099]  [<ffffffff8107eb7d>] ? trace_hardirqs_on+0xd/0x10
> [ 1920.558103]  [<ffffffff8136f922>] ? usbfs_conn_disc_event+0x12/0x40
> [ 1920.558107]  [<ffffffff8147896e>] mutex_lock_nested+0x3e/0x50
> [ 1920.558111]  [<ffffffff8136f922>] usbfs_conn_disc_event+0x12/0x40
> [ 1920.558115]  [<ffffffff81371184>] usbfs_notify+0xa4/0x240

Thanks, seems like a lock is taken twice.
Dmitry, can you test this patch, too?

	Regards
		Oliver