diff options
| author | Takashi Iwai <tiwai@suse.de> | 2014-12-06 18:02:55 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-12-16 09:37:12 -0800 |
| commit | 37ae58a932ac9c767e677ff1dbde8cfb4939aef8 (patch) | |
| tree | 64919a2478982e30e8a49ab0c5dc460298d0e416 /fs/sysfs | |
| parent | dba8c7756c8978e9242baed43697a998fe7af83a (diff) | |
ALSA: usb-audio: Don't resubmit pending URBs at MIDI error recovery
commit 66139a48cee1530c91f37c145384b4ee7043f0b7 upstream.
In snd_usbmidi_error_timer(), the driver tries to resubmit MIDI input
URBs to reactivate the MIDI stream, but this causes the error when
some of URBs are still pending like:
WARNING: CPU: 0 PID: 0 at ../drivers/usb/core/urb.c:339 usb_submit_urb+0x5f/0x70()
URB ef705c40 submitted while active
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.16.6-2-desktop #1
Hardware name: FOXCONN TPS01/TPS01, BIOS 080015 03/23/2010
c0984bfa f4009ed4 c078deaf f4009ee4 c024c884 c09a135c f4009f00 00000000
c0984bfa 00000153 c061ac4f c061ac4f 00000009 00000001 ef705c40 e854d1c0
f4009eec c024c8d3 00000009 f4009ee4 c09a135c f4009f00 f4009f04 c061ac4f
Call Trace:
[<c0205df6>] try_stack_unwind+0x156/0x170
[<c020482a>] dump_trace+0x5a/0x1b0
[<c0205e56>] show_trace_log_lvl+0x46/0x50
[<c02049d1>] show_stack_log_lvl+0x51/0xe0
[<c0205eb7>] show_stack+0x27/0x50
[<c078deaf>] dump_stack+0x45/0x65
[<c024c884>] warn_slowpath_common+0x84/0xa0
[<c024c8d3>] warn_slowpath_fmt+0x33/0x40
[<c061ac4f>] usb_submit_urb+0x5f/0x70
[<f7974104>] snd_usbmidi_submit_urb+0x14/0x60 [snd_usbmidi_lib]
[<f797483a>] snd_usbmidi_error_timer+0x6a/0xa0 [snd_usbmidi_lib]
[<c02570c0>] call_timer_fn+0x30/0x130
[<c0257442>] run_timer_softirq+0x1c2/0x260
[<c0251493>] __do_softirq+0xc3/0x270
[<c0204732>] do_softirq_own_stack+0x22/0x30
[<c025186d>] irq_exit+0x8d/0xa0
[<c0795228>] smp_apic_timer_interrupt+0x38/0x50
[<c0794a3c>] apic_timer_interrupt+0x34/0x3c
[<c0673d9e>] cpuidle_enter_state+0x3e/0xd0
[<c028bb8d>] cpu_idle_loop+0x29d/0x3e0
[<c028bd23>] cpu_startup_entry+0x53/0x60
[<c0bfac1e>] start_kernel+0x415/0x41a
For avoiding these errors, check the pending URBs and skip
resubmitting such ones.
Reported-and-tested-by: Stefan Seyfried <stefan.seyfried@googlemail.com>
Acked-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/sysfs')
0 files changed, 0 insertions, 0 deletions