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  1. 10 May, 2016 17 commits
  3. 08 May, 2016 14 commits
  5. 25 Apr, 2016 3 commits
  7. 20 Apr, 2016 6 commits
    • Eric Dumazet's avatar
      tcp_cubic: better follow cubic curve after idle period · 1d155a6c
      Eric Dumazet authored 
      [ Upstream commit 30927520 ]

Jana Iyengar found an interesting issue on CUBIC :

The epoch is only updated/reset initially and when experiencing losses.
The delta "t" of now - epoch_start can be arbitrary large after app idle
as well as the bic_target. Consequentially the slope (inverse of
ca->cnt) would be really large, and eventually ca->cnt would be
lower-bounded in the end to 2 to have delayed-ACK slow-start behavior.

This particularly shows up when slow_start_after_idle is disabled
as a dangerous cwnd inflation (1.5 x RTT) after few seconds of idle
time.

Jana initial fix was to reset epoch_start if app limited,
but Neal pointed out it would ask the CUBIC algorithm to recalculate the
curve so that we again start growing steeply upward from where cwnd is
now (as CUBIC does just after a loss). Ideally we'd want the cwnd growth
curve to be the same shape, just shifted later in time by the amount of
the idle period.
Reported-by: default avatarJana Iyengar <jri@google.com>
Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarYuchung Cheng <ycheng@google.com>
Signed-off-by: default avatarNeal Cardwell <ncardwell@google.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Sangtae Ha <sangtae.ha@gmail.com>
Cc: Lawrence Brakmo <lawrence@brakmo.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
      1d155a6c
    • Robert Dobrowolski's avatar
      usb: hcd: out of bounds access in for_each_companion · b016f99b
      Robert Dobrowolski authored 
      [ Upstream commit e86103a7 ]

On BXT platform Host Controller and Device Controller figure as
same PCI device but with different device function. HCD should
not pass data to Device Controller but only to Host Controllers.
Checking if companion device is Host Controller, otherwise skip.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarRobert Dobrowolski <robert.dobrowolski@linux.intel.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
      b016f99b
    • Hans de Goede's avatar
      USB: uas: Add a new NO_REPORT_LUNS quirk · 17c094b0
      Hans de Goede authored 
      [ Upstream commit 13630746 ]

Add a new NO_REPORT_LUNS quirk and set it for Seagate drives with
an usb-id of: 0bc2:331a, as these will fail to respond to a
REPORT_LUNS command.

Cc: stable@vger.kernel.org
Reported-and-tested-by: default avatarDavid Webb <djw@noc.ac.uk>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Acked-by: default avatarAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
      17c094b0
    • Mathias Nyman's avatar
      xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers · c5fcfe5f
      Mathias Nyman authored 
      [ Upstream commit 98d74f9c ]

PCI hotpluggable xhci controllers such as some Alpine Ridge solutions will
remove the xhci controller from the PCI bus when the last USB device is
disconnected.

Add a flag to indicate that the host is being removed to avoid queueing
configure_endpoint commands for the dropped endpoints.
For PCI hotplugged controllers this will prevent 5 second command timeouts
For static xhci controllers the configure_endpoint command is not needed
in the removal case as everything will be returned, freed, and the
controller is reset.

For now the flag is only set for PCI connected host controllers.

Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
      c5fcfe5f
    • Roger Quadros's avatar
      usb: xhci: fix xhci locking up during hcd remove · 5d0b7d47
      Roger Quadros authored 
      [ Upstream commit ad6b1d91 ]

The problem seems to be that if a new device is detected
while we have already removed the shared HCD, then many of the
xhci operations (e.g.  xhci_alloc_dev(), xhci_setup_device())
hang as command never completes.

I don't think XHCI can operate without the shared HCD as we've
already called xhci_halt() in xhci_only_stop_hcd() when shared HCD
goes away. We need to prevent new commands from being queued
not only when HCD is dying but also when HCD is halted.

The following lockup was detected while testing the otg state
machine.

[  178.199951] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
[  178.205799] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 1
[  178.214458] xhci-hcd xhci-hcd.0.auto: hcc params 0x0220f04c hci version 0x100 quirks 0x00010010
[  178.223619] xhci-hcd xhci-hcd.0.auto: irq 400, io mem 0x48890000
[  178.230677] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[  178.237796] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[  178.245358] usb usb1: Product: xHCI Host Controller
[  178.250483] usb usb1: Manufacturer: Linux 4.0.0-rc1-00024-g6111320 xhci-hcd
[  178.257783] usb usb1: SerialNumber: xhci-hcd.0.auto
[  178.267014] hub 1-0:1.0: USB hub found
[  178.272108] hub 1-0:1.0: 1 port detected
[  178.278371] xhci-hcd xhci-hcd.0.auto: xHCI Host Controller
[  178.284171] xhci-hcd xhci-hcd.0.auto: new USB bus registered, assigned bus number 2
[  178.294038] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
[  178.301183] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[  178.308776] usb usb2: Product: xHCI Host Controller
[  178.313902] usb usb2: Manufacturer: Linux 4.0.0-rc1-00024-g6111320 xhci-hcd
[  178.321222] usb usb2: SerialNumber: xhci-hcd.0.auto
[  178.329061] hub 2-0:1.0: USB hub found
[  178.333126] hub 2-0:1.0: 1 port detected
[  178.567585] dwc3 48890000.usb: usb_otg_start_host 0
[  178.572707] xhci-hcd xhci-hcd.0.auto: remove, state 4
[  178.578064] usb usb2: USB disconnect, device number 1
[  178.586565] xhci-hcd xhci-hcd.0.auto: USB bus 2 deregistered
[  178.592585] xhci-hcd xhci-hcd.0.auto: remove, state 1
[  178.597924] usb usb1: USB disconnect, device number 1
[  178.603248] usb 1-1: new high-speed USB device number 2 using xhci-hcd
[  190.597337] INFO: task kworker/u4:0:6 blocked for more than 10 seconds.
[  190.604273]       Not tainted 4.0.0-rc1-00024-g6111320 #1058
[  190.610228] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  190.618443] kworker/u4:0    D c05c0ac0     0     6      2 0x00000000
[  190.625120] Workqueue: usb_otg usb_otg_work
[  190.629533] [<c05c0ac0>] (__schedule) from [<c05c10ac>] (schedule+0x34/0x98)
[  190.636915] [<c05c10ac>] (schedule) from [<c05c1318>] (schedule_preempt_disabled+0xc/0x10)
[  190.645591] [<c05c1318>] (schedule_preempt_disabled) from [<c05c23d0>] (mutex_lock_nested+0x1ac/0x3fc)
[  190.655353] [<c05c23d0>] (mutex_lock_nested) from [<c046cf8c>] (usb_disconnect+0x3c/0x208)
[  190.664043] [<c046cf8c>] (usb_disconnect) from [<c0470cf0>] (_usb_remove_hcd+0x98/0x1d8)
[  190.672535] [<c0470cf0>] (_usb_remove_hcd) from [<c0485da8>] (usb_otg_start_host+0x50/0xf4)
[  190.681299] [<c0485da8>] (usb_otg_start_host) from [<c04849a4>] (otg_set_protocol+0x5c/0xd0)
[  190.690153] [<c04849a4>] (otg_set_protocol) from [<c0484b88>] (otg_set_state+0x170/0xbfc)
[  190.698735] [<c0484b88>] (otg_set_state) from [<c0485740>] (otg_statemachine+0x12c/0x470)
[  190.707326] [<c0485740>] (otg_statemachine) from [<c0053c84>] (process_one_work+0x1b4/0x4a0)
[  190.716162] [<c0053c84>] (process_one_work) from [<c00540f8>] (worker_thread+0x154/0x44c)
[  190.724742] [<c00540f8>] (worker_thread) from [<c0058f88>] (kthread+0xd4/0xf0)
[  190.732328] [<c0058f88>] (kthread) from [<c000e810>] (ret_from_fork+0x14/0x24)
[  190.739898] 5 locks held by kworker/u4:0/6:
[  190.744274]  #0:  ("%s""usb_otg"){.+.+.+}, at: [<c0053bf4>] process_one_work+0x124/0x4a0
[  190.752799]  #1:  ((&otgd->work)){+.+.+.}, at: [<c0053bf4>] process_one_work+0x124/0x4a0
[  190.761326]  #2:  (&otgd->fsm.lock){+.+.+.}, at: [<c048562c>] otg_statemachine+0x18/0x470
[  190.769934]  #3:  (usb_bus_list_lock){+.+.+.}, at: [<c0470ce8>] _usb_remove_hcd+0x90/0x1d8
[  190.778635]  #4:  (&dev->mutex){......}, at: [<c046cf8c>] usb_disconnect+0x3c/0x208
[  190.786700] INFO: task kworker/1:0:14 blocked for more than 10 seconds.
[  190.793633]       Not tainted 4.0.0-rc1-00024-g6111320 #1058
[  190.799567] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  190.807783] kworker/1:0     D c05c0ac0     0    14      2 0x00000000
[  190.814457] Workqueue: usb_hub_wq hub_event
[  190.818866] [<c05c0ac0>] (__schedule) from [<c05c10ac>] (schedule+0x34/0x98)
[  190.826252] [<c05c10ac>] (schedule) from [<c05c4e40>] (schedule_timeout+0x13c/0x1ec)
[  190.834377] [<c05c4e40>] (schedule_timeout) from [<c05c19f0>] (wait_for_common+0xbc/0x150)
[  190.843062] [<c05c19f0>] (wait_for_common) from [<bf068a3c>] (xhci_setup_device+0x164/0x5cc [xhci_hcd])
[  190.852986] [<bf068a3c>] (xhci_setup_device [xhci_hcd]) from [<c046b7f4>] (hub_port_init+0x3f4/0xb10)
[  190.862667] [<c046b7f4>] (hub_port_init) from [<c046eb64>] (hub_event+0x704/0x1018)
[  190.870704] [<c046eb64>] (hub_event) from [<c0053c84>] (process_one_work+0x1b4/0x4a0)
[  190.878919] [<c0053c84>] (process_one_work) from [<c00540f8>] (worker_thread+0x154/0x44c)
[  190.887503] [<c00540f8>] (worker_thread) from [<c0058f88>] (kthread+0xd4/0xf0)
[  190.895076] [<c0058f88>] (kthread) from [<c000e810>] (ret_from_fork+0x14/0x24)
[  190.902650] 5 locks held by kworker/1:0/14:
[  190.907023]  #0:  ("usb_hub_wq"){.+.+.+}, at: [<c0053bf4>] process_one_work+0x124/0x4a0
[  190.915454]  #1:  ((&hub->events)){+.+.+.}, at: [<c0053bf4>] process_one_work+0x124/0x4a0
[  190.924070]  #2:  (&dev->mutex){......}, at: [<c046e490>] hub_event+0x30/0x1018
[  190.931768]  #3:  (&port_dev->status_lock){+.+.+.}, at: [<c046eb50>] hub_event+0x6f0/0x1018
[  190.940558]  #4:  (&bus->usb_address0_mutex){+.+.+.}, at: [<c046b458>] hub_port_init+0x58/0xb10
Signed-off-by: default avatarRoger Quadros <rogerq@ti.com>
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
      5d0b7d47
    • Lu Baolu's avatar
      usb: xhci: fix wild pointers in xhci_mem_cleanup · bd713f99
      Lu Baolu authored 
      [ Upstream commit 71504062 ]

This patch fixes some wild pointers produced by xhci_mem_cleanup.
These wild pointers will cause system crash if xhci_mem_cleanup()
is called twice.
Reported-and-tested-by: default avatarPengcheng Li <lpc.li@hisilicon.com>
Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarSasha Levin <sasha.levin@oracle.com>
      bd713f99
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