From: Ben Hutchings <ben@decadent.org.uk>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk,
Octavian Purdila <octavian.purdila@intel.com>,
Alan Stern <stern@rowland.harvard.edu>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: [ 066/105] usb hub: send clear_tt_buffer_complete events when canceling TT clear work
Date: Sun, 28 Oct 2012 23:16:42 +0000 [thread overview]
Message-ID: <20121028231557.321897014@decadent.org.uk> (raw)
In-Reply-To: <20121028231536.970033833@decadent.org.uk>
3.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Octavian Purdila <octavian.purdila@intel.com>
commit 3b6054da68f9b0d5ed6a7ed0f42a79e61904352c upstream.
There is a race condition in the USB hub code with regard to handling
TT clear requests that can get the HCD driver in a deadlock. Usually
when an TT clear request is scheduled it will be executed immediately:
<7>[ 6.077583] usb 2-1.3: unlink qh1-0e01/f4d4db00 start 0 [1/2 us]
<3>[ 6.078041] usb 2-1: clear tt buffer port 3, a3 ep2 t04048d82
<7>[ 6.078299] hub_tt_work:731
<7>[ 9.309089] usb 2-1.5: link qh1-0e01/f4d506c0 start 0 [1/2 us]
<7>[ 9.324526] ehci_hcd 0000:00:1d.0: reused qh f4d4db00 schedule
<7>[ 9.324539] usb 2-1.3: link qh1-0e01/f4d4db00 start 0 [1/2 us]
<7>[ 9.341530] usb 1-1.1: link qh4-0e01/f397aec0 start 2 [1/2 us]
<7>[ 10.116159] usb 2-1.3: unlink qh1-0e01/f4d4db00 start 0 [1/2 us]
<3>[ 10.116459] usb 2-1: clear tt buffer port 3, a3 ep2 t04048d82
<7>[ 10.116537] hub_tt_work:731
However, if a suspend operation is triggered before hub_tt_work is
scheduled, hub_quiesce will cancel the work without notifying the HCD
driver:
<3>[ 35.033941] usb 2-1: clear tt buffer port 3, a3 ep2 t04048d80
<5>[ 35.034022] sd 0:0:0:0: [sda] Stopping disk
<7>[ 35.034039] hub 2-1:1.0: hub_suspend
<7>[ 35.034067] usb 2-1: unlink qh256-0001/f3b1ab00 start 1 [1/0 us]
<7>[ 35.035085] hub 1-0:1.0: hub_suspend
<7>[ 35.035102] usb usb1: bus suspend, wakeup 0
<7>[ 35.035106] ehci_hcd 0000:00:1a.0: suspend root hub
<7>[ 35.035298] hub 2-0:1.0: hub_suspend
<7>[ 35.035313] usb usb2: bus suspend, wakeup 0
<7>[ 35.035315] ehci_hcd 0000:00:1d.0: suspend root hub
<6>[ 35.250017] PM: suspend of devices complete after 216.979 msecs
<6>[ 35.250822] PM: late suspend of devices complete after 0.799 msecs
<7>[ 35.252343] ehci_hcd 0000:00:1d.0: wakeup: 1
<7>[ 35.262923] ehci_hcd 0000:00:1d.0: --> PCI D3hot
<7>[ 35.263302] ehci_hcd 0000:00:1a.0: wakeup: 1
<7>[ 35.273912] ehci_hcd 0000:00:1a.0: --> PCI D3hot
<6>[ 35.274254] PM: noirq suspend of devices complete after 23.442 msecs
<6>[ 35.274975] ACPI: Preparing to enter system sleep state S3
<6>[ 35.292666] PM: Saving platform NVS memory
<7>[ 35.295030] Disabling non-boot CPUs ...
<6>[ 35.297351] CPU 1 is now offline
<6>[ 35.300345] CPU 2 is now offline
<6>[ 35.303929] CPU 3 is now offline
<7>[ 35.303931] lockdep: fixing up alternatives.
<6>[ 35.304825] Extended CMOS year: 2000
When the device will resume the EHCI driver will get stuck in
ehci_endpoint_disable waiting for the tt_clearing flag to reset:
<0>[ 47.610967] usb 2-1.3: **** DPM device timeout ****
<7>[ 47.610972] f2f11c60 00000092 f2f11c0c c10624a5 00000003 f4c6e880 c1c8a4c0 c1c8a4c0
<7>[ 47.610983] 15c55698 0000000b f56b34c0 f2a45b70 f4c6e880 00000082 f2a4602c f2f11c30
<7>[ 47.610993] c10787f8 f4cac000 f2a45b70 00000000 f4cac010 f2f11c58 00000046 00000001
<7>[ 47.611004] Call Trace:
<7>[ 47.611006] [<c10624a5>] ? sched_clock_cpu+0xf5/0x160
<7>[ 47.611019] [<c10787f8>] ? lock_release_holdtime.part.22+0x88/0xf0
<7>[ 47.611026] [<c103ed46>] ? lock_timer_base.isra.35+0x26/0x50
<7>[ 47.611034] [<c17592d3>] ? schedule_timeout+0x133/0x290
<7>[ 47.611044] [<c175b43e>] schedule+0x1e/0x50
<7>[ 47.611051] [<c17592d8>] schedule_timeout+0x138/0x290
<7>[ 47.611057] [<c10624a5>] ? sched_clock_cpu+0xf5/0x160
<7>[ 47.611063] [<c103e560>] ? usleep_range+0x40/0x40
<7>[ 47.611070] [<c1759445>] schedule_timeout_uninterruptible+0x15/0x20
<7>[ 47.611077] [<c14935f4>] ehci_endpoint_disable+0x64/0x160
<7>[ 47.611084] [<c147d1ee>] ? usb_hcd_flush_endpoint+0x10e/0x1d0
<7>[ 47.611092] [<c1165663>] ? sysfs_add_file+0x13/0x20
<7>[ 47.611100] [<c147d5a9>] usb_hcd_disable_endpoint+0x29/0x40
<7>[ 47.611107] [<c147fafc>] usb_disable_endpoint+0x5c/0x80
<7>[ 47.611111] [<c147fb57>] usb_disable_interface+0x37/0x50
<7>[ 47.611116] [<c1477650>] usb_reset_and_verify_device+0x4b0/0x640
<7>[ 47.611122] [<c1474665>] ? hub_port_status+0xb5/0x100
<7>[ 47.611129] [<c147a975>] usb_port_resume+0xd5/0x220
<7>[ 47.611136] [<c148877f>] generic_resume+0xf/0x30
<7>[ 47.611142] [<c14821a3>] usb_resume+0x133/0x180
<7>[ 47.611147] [<c1473b10>] ? usb_dev_thaw+0x10/0x10
<7>[ 47.611152] [<c1473b1d>] usb_dev_resume+0xd/0x10
<7>[ 47.611157] [<c13baa60>] dpm_run_callback+0x40/0xb0
<7>[ 47.611164] [<c13bdb03>] ? pm_runtime_enable+0x43/0x70
<7>[ 47.611171] [<c13bafc6>] device_resume+0x1a6/0x2c0
<7>[ 47.611177] [<c13ba940>] ? dpm_show_time+0xe0/0xe0
<7>[ 47.611183] [<c13bb0f9>] async_resume+0x19/0x40
<7>[ 47.611189] [<c10580c4>] async_run_entry_fn+0x64/0x160
<7>[ 47.611196] [<c104a244>] ? process_one_work+0x104/0x480
<7>[ 47.611203] [<c104a24c>] ? process_one_work+0x10c/0x480
<7>[ 47.611209] [<c104a2c0>] process_one_work+0x180/0x480
<7>[ 47.611215] [<c104a244>] ? process_one_work+0x104/0x480
<7>[ 47.611220] [<c1058060>] ? async_schedule+0x10/0x10
<7>[ 47.611226] [<c104c15c>] worker_thread+0x11c/0x2f0
<7>[ 47.611233] [<c104c040>] ? manage_workers.isra.27+0x1f0/0x1f0
<7>[ 47.611239] [<c10507f8>] kthread+0x78/0x80
<7>[ 47.611244] [<c1750000>] ? timer_cpu_notify+0xd6/0x20d
<7>[ 47.611253] [<c1050780>] ? __init_kthread_worker+0x60/0x60
<7>[ 47.611258] [<c176357e>] kernel_thread_helper+0x6/0xd
<7>[ 47.611283] ------------[ cut here ]------------
This patch changes hub_quiesce behavior to flush the TT clear work
instead of canceling it, to make sure that no TT clear request remains
uncompleted before suspend.
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/usb/core/hub.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 64854d7..1181e91 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -739,13 +739,16 @@ static void hub_tt_work(struct work_struct *work)
int limit = 100;
spin_lock_irqsave (&hub->tt.lock, flags);
- while (--limit && !list_empty (&hub->tt.clear_list)) {
+ while (!list_empty(&hub->tt.clear_list)) {
struct list_head *next;
struct usb_tt_clear *clear;
struct usb_device *hdev = hub->hdev;
const struct hc_driver *drv;
int status;
+ if (!hub->quiescing && --limit < 0)
+ break;
+
next = hub->tt.clear_list.next;
clear = list_entry (next, struct usb_tt_clear, clear_list);
list_del (&clear->clear_list);
@@ -1210,7 +1213,7 @@ static void hub_quiesce(struct usb_hub *hub, enum hub_quiescing_type type)
if (hub->has_indicators)
cancel_delayed_work_sync(&hub->leds);
if (hub->tt.hub)
- cancel_work_sync(&hub->tt.clear_work);
+ flush_work_sync(&hub->tt.clear_work);
}
/* caller has locked the hub device */
next prev parent reply other threads:[~2012-10-28 23:39 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-28 23:15 [ 000/105] 3.2.33-stable review Ben Hutchings
2012-10-28 23:15 ` [ 001/105] netfilter: ipset: avoid use of kernel-only types Ben Hutchings
2012-10-28 23:15 ` [ 002/105] samsung-laptop: dont handle backlight if handled by acpi/video Ben Hutchings
2012-10-28 23:15 ` [ 003/105] samsung-laptop: make the dmi check less strict (part 2) Ben Hutchings
2012-10-28 23:15 ` [ 004/105] jbd: Fix assertion failure in commit code due to lacking transaction credits Ben Hutchings
2012-10-28 23:15 ` [ 005/105] mtd: nand: allow NAND_NO_SUBPAGE_WRITE to be set from driver Ben Hutchings
2012-10-28 23:15 ` [ 006/105] ALSA: hda - Fix oops caused by recent commit "Fix internal mic for Lenovo Ideapad U300s" Ben Hutchings
2012-10-28 23:15 ` [ 007/105] e1000: fix vlan processing regression Ben Hutchings
2012-10-28 23:15 ` [ 008/105] SUNRPC: Set alloc_slot for backchannel tcp ops Ben Hutchings
2012-10-28 23:15 ` [ 009/105] drm/i915: dont pwrite tiled objects through the gtt Ben Hutchings
2012-10-28 23:15 ` [ 010/105] drm/i915: no lvds quirk for Zotac ZDBOX SD ID12/ID13 Ben Hutchings
2012-10-28 23:15 ` [ 011/105] sparc64: fix ptrace interaction with force_successful_syscall_return() Ben Hutchings
2012-10-28 23:15 ` [ 012/105] sparc64: Like x86 we should check current->mm during perf backtrace generation Ben Hutchings
2012-10-28 23:15 ` [ 013/105] sparc64: Fix bit twiddling in sparc_pmu_enable_event() Ben Hutchings
2012-10-28 23:15 ` [ 014/105] sparc64: do not clobber personality flags in sys_sparc64_personality() Ben Hutchings
2012-10-28 23:15 ` [ 015/105] sparc64: Be less verbose during vmemmap population Ben Hutchings
2012-10-28 23:15 ` [ 016/105] [media] au0828: fix case where STREAMOFF being called on stopped stream causes BUG() Ben Hutchings
2012-10-28 23:15 ` [ 017/105] net: Fix skb_under_panic oops in neigh_resolve_output Ben Hutchings
2012-10-28 23:15 ` [ 018/105] skge: Add DMA mask quirk for Marvell 88E8001 on ASUS P5NSLI motherboard Ben Hutchings
2012-10-28 23:15 ` [ 019/105] vlan: dont deliver frames for unknown vlans to protocols Ben Hutchings
2012-10-28 23:15 ` [ 020/105] RDS: fix rds-ping spinlock recursion Ben Hutchings
2012-10-28 23:15 ` [ 021/105] tcp: resets are misrouted Ben Hutchings
2012-10-28 23:15 ` [ 022/105] staging: comedi: amplc_pc236: fix invalid register access during detach Ben Hutchings
2012-10-28 23:15 ` [ 023/105] nfsd4: fix nfs4 stateid leak Ben Hutchings
2012-10-28 23:16 ` [ 024/105] viafb: dont touch clock state on OLPC XO-1.5 Ben Hutchings
2012-10-28 23:16 ` [ 025/105] module: taint kernel when lve module is loaded Ben Hutchings
2012-10-28 23:16 ` [ 026/105] ACPI: EC: Make the GPE storm threshold a module parameter Ben Hutchings
2012-10-29 0:04 ` Jonathan Nieder
2012-10-28 23:16 ` [ 027/105] ACPI: EC: Add a quirk for CLEVO M720T/M730T laptop Ben Hutchings
2012-10-28 23:16 ` [ 028/105] ARM: vfp: fix saving d16-d31 vfp registers on v6+ kernels Ben Hutchings
2012-10-28 23:16 ` [ 029/105] [SCSI] scsi_debug: Fix off-by-one bug when unmapping region Ben Hutchings
2012-10-28 23:16 ` [ 030/105] [SCSI] storvsc: Account for in-transit packets in the RESET path Ben Hutchings
2012-10-28 23:16 ` [ 031/105] timers: Fix endless looping between cascade() and internal_add_timer() Ben Hutchings
2012-10-28 23:16 ` [ 032/105] timekeeping: Cast raw_interval to u64 to avoid shift overflow Ben Hutchings
2012-10-28 23:16 ` [ 033/105] video/udlfb: fix line counting in fb_write Ben Hutchings
2012-10-28 23:16 ` [ 034/105] tmpfs,ceph,gfs2,isofs,reiserfs,xfs: fix fh_len checking Ben Hutchings
2012-10-28 23:16 ` [ 035/105] ext4: race-condition protection for ext4_convert_unwritten_extents_endio Ben Hutchings
2012-10-28 23:16 ` [ 036/105] ALSA: hda - Fix memory leaks at error path in patch_cirrus.c Ben Hutchings
2012-10-28 23:16 ` [ 037/105] nohz: Fix idle ticks in cpu summary line of /proc/stat Ben Hutchings
2012-10-28 23:16 ` [ 038/105] ALSA: hda - do not detect jack on internal speakers for Realtek Ben Hutchings
2012-10-28 23:16 ` [ 039/105] pktgen: fix crash when generating IPv6 packets Ben Hutchings
2012-10-28 23:16 ` [ 040/105] md/raid10: use correct limit variable Ben Hutchings
2012-10-28 23:16 ` [ 041/105] Bluetooth: SMP: Fix setting unknown auth_req bits Ben Hutchings
2012-10-28 23:16 ` [ 042/105] mips,kgdb: fix recursive page fault with CONFIG_KPROBES Ben Hutchings
2012-10-28 23:16 ` [ 043/105] xen/bootup: allow read_tscp call for Xen PV guests Ben Hutchings
2012-10-28 23:16 ` [ 044/105] xen/bootup: allow {read|write}_cr8 pvops call Ben Hutchings
2012-10-28 23:16 ` [ 045/105] pcmcia: sharpsl: dont discard sharpsl_pcmcia_ops Ben Hutchings
2012-10-28 23:16 ` [ 046/105] oprofile, x86: Fix wrapping bug in op_x86_get_ctrl() Ben Hutchings
2012-10-28 23:16 ` [ 047/105] drm/radeon: Dont destroy I2C Bus Rec in radeon_ext_tmds_enc_destroy() Ben Hutchings
2012-10-28 23:16 ` [ 048/105] mac80211: check if key has TKIP type before updating IV Ben Hutchings
2012-10-28 23:16 ` [ 049/105] bcma: fix unregistration of cores Ben Hutchings
2012-10-28 23:16 ` [ 050/105] net/wireless: ipw2200: Fix panic occurring in ipw_handle_promiscuous_tx() Ben Hutchings
2012-10-28 23:16 ` [ 051/105] iwlwifi: fix 6000 series channel switch command Ben Hutchings
2012-10-28 23:16 ` [ 052/105] cgroup: notify_on_release may not be triggered in some cases Ben Hutchings
2012-10-28 23:16 ` [ 053/105] ALSA: hda - Always check array bounds in alc_get_line_out_pfx Ben Hutchings
2012-10-28 23:16 ` [ 054/105] NLM: nlm_lookup_file() may return NLMv4-specific error codes Ben Hutchings
2012-10-28 23:16 ` [ 055/105] SUNRPC: Prevent kernel stack corruption on long values of flush Ben Hutchings
2012-10-28 23:16 ` [ 056/105] USB: cdc-acm: fix pipe type of write endpoint Ben Hutchings
2012-10-28 23:16 ` [ 057/105] usb: acm: fix the computation of the number of data bits Ben Hutchings
2012-10-28 23:16 ` [ 058/105] usb: host: xhci: New system added for Compliance Mode Patch on SN65LVPE502CP Ben Hutchings
2012-10-28 23:16 ` [ 059/105] USB: option: blacklist net interface on ZTE devices Ben Hutchings
2012-10-28 23:16 ` [ 060/105] USB: option: add more " Ben Hutchings
2012-10-28 23:16 ` [ 061/105] s390: fix linker script for 31 bit builds Ben Hutchings
2012-10-28 23:16 ` [ 062/105] xen/x86: dont corrupt %eip when returning from a signal handler Ben Hutchings
2012-10-28 23:16 ` [ 063/105] ALSA: hda - add dock support for Thinkpad T430 Ben Hutchings
2012-10-28 23:16 ` [ 064/105] kernel/sys.c: fix stack memory content leak via UNAME26 Ben Hutchings
2012-10-28 23:16 ` [ 065/105] ARM: 7559/1: smp: switch away from the idmap before updating init_mm.mm_count Ben Hutchings
2012-10-28 23:16 ` Ben Hutchings [this message]
2012-10-28 23:16 ` [ 067/105] cpufreq / powernow-k8: Remove usage of smp_processor_id() in preemptible code Ben Hutchings
2012-10-28 23:16 ` [ 068/105] arch/tile: avoid generating .eh_frame information in modules Ben Hutchings
2012-10-28 23:16 ` [ 069/105] amd64_edac:__amd64_set_scrub_rate(): avoid overindexing scrubrates[] Ben Hutchings
2012-10-28 23:16 ` [ 070/105] SUNRPC: Clear the connect flag when socket state is TCP_CLOSE_WAIT Ben Hutchings
2012-10-28 23:16 ` [ 071/105] Revert "SUNRPC: Ensure we close the socket on EPIPE errors too..." Ben Hutchings
2012-10-28 23:16 ` [ 072/105] SUNRPC: Prevent races in xs_abort_connection() Ben Hutchings
2012-10-28 23:16 ` [ 073/105] SUNRPC: Get rid of the xs_error_report socket callback Ben Hutchings
2012-10-28 23:16 ` [ 074/105] Revert "ath9k_hw: Updated AR9003 tx gain table for 5GHz" Ben Hutchings
2012-10-28 23:16 ` [ 075/105] USB: serial: Fix memory leak in sierra_release() Ben Hutchings
2012-10-28 23:16 ` [ 076/105] usb-storage: add unusual_devs entry for Casio EX-N1 digital camera Ben Hutchings
2012-10-28 23:16 ` [ 077/105] Drivers: hv: Cleanup error handling in vmbus_open() Ben Hutchings
2012-10-28 23:16 ` [ 078/105] sysfs: sysfs_pathname/sysfs_add_one: Use strlcat() instead of strcat() Ben Hutchings
2012-10-28 23:16 ` [ 079/105] vhost: fix mergeable bufs on BE hosts Ben Hutchings
2012-10-28 23:16 ` [ 080/105] USB: whiteheat: fix memory leak in error path Ben Hutchings
2012-10-28 23:16 ` [ 081/105] USB: opticon: fix DMA from stack Ben Hutchings
2012-10-28 23:16 ` [ 082/105] USB: opticon: fix memory leak in error path Ben Hutchings
2012-10-28 23:16 ` [ 083/105] USB: mct_u232: fix broken close Ben Hutchings
2012-10-28 23:17 ` [ 084/105] USB: sierra: fix memory leak in attach error path Ben Hutchings
2012-10-28 23:17 ` [ 085/105] USB: sierra: fix memory leak in probe " Ben Hutchings
2012-10-28 23:17 ` [ 086/105] USB: mos7840: fix urb leak at release Ben Hutchings
2012-10-28 23:17 ` [ 087/105] USB: mos7840: fix port-device leak in error path Ben Hutchings
2012-10-28 23:17 ` [ 088/105] USB: mos7840: remove NULL-urb submission Ben Hutchings
2012-10-28 23:17 ` [ 089/105] USB: mos7840: remove invalid disconnect handling Ben Hutchings
2012-10-28 23:17 ` [ 090/105] ehci: fix Lucid nohandoff pci quirk to be more generic with BIOS versions Ben Hutchings
2012-10-28 23:17 ` [ 091/105] ehci: Add yet-another Lucid nohandoff pci quirk Ben Hutchings
2012-10-28 23:17 ` [ 092/105] xhci: Fix potential NULL ptr deref in command cancellation Ben Hutchings
2012-10-28 23:17 ` [ 093/105] freezer: exec should clear PF_NOFREEZE along with PF_KTHREAD Ben Hutchings
2012-10-28 23:17 ` [ 094/105] mm: fix XFS oops due to dirty pages without buffers on s390 Ben Hutchings
2012-10-28 23:17 ` [ 095/105] genalloc: stop crashing the system when destroying a pool Ben Hutchings
2012-10-28 23:17 ` [ 096/105] drivers/rtc/rtc-imxdi.c: add missing spin lock initialization Ben Hutchings
2012-10-28 23:17 ` [ 097/105] gen_init_cpio: avoid stack overflow when expanding Ben Hutchings
2012-10-28 23:17 ` [ 098/105] fs/compat_ioctl.c: VIDEO_SET_SPU_PALETTE missing error check Ben Hutchings
2012-10-28 23:17 ` [ 099/105] Revert "lockd: use rpc clients cl_nodename for id encoding" Ben Hutchings
2012-10-28 23:17 ` [ 100/105] netfilter: nf_conntrack: fix racy timer handling with reliable events Ben Hutchings
2012-10-28 23:17 ` [ 101/105] tpm: Propagate error from tpm_transmit to fix a timeout hang Ben Hutchings
2012-10-28 23:17 ` [ 102/105] usb: gadget: at91_udc: fix dt support Ben Hutchings
2012-10-29 6:21 ` Fabio Porcedda
2012-10-29 14:41 ` Ben Hutchings
2012-10-28 23:17 ` [ 103/105] ALSA: ac97 - Fix missing NULL check in snd_ac97_cvol_new() Ben Hutchings
2012-10-28 23:17 ` [ 104/105] ALSA: emu10k1: add chip details for E-mu 1010 PCIe card Ben Hutchings
2012-10-28 23:17 ` [ 105/105] Add CDC-ACM support for the CX93010-2x UCMxx USB Modem Ben Hutchings
2012-10-29 2:24 ` [ 000/105] 3.2.33-stable review Ben Hutchings
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