[REGRESSION] resume takes 10s longer due to e1b6eb3 (Bluetooth:Increase HCI reset timeout ...)

From: TomÃÅ JanouÅek
Date: Fri Nov 18 2011 - 13:40:25 EST

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Hello,

while testing the 3.2-rc kernel, I experienced that resume takes 10 seconds
more than usual, and bisected this to be caused by e1b6eb3 (Bluetooth:
Increase HCI reset timeout in hci_dev_do_close).

My hardware is Lenovo ThinkPad T420, model number 4178-A3G, with a Broadcom
Bluetooth adapter (I'm attaching the relevant part of lsusb).

The relevant portion of dmesg is:
[ 76.502818] usb 1-1.4: reset full-speed USB device number 4 using ehci_hcd
[ 76.588225] btusb 1-1.4:1.0: no reset_resume for driver btusb?
[ 76.591870] btusb 1-1.4:1.1: no reset_resume for driver btusb?
[ 86.565269] PM: resume of devices complete after 10486.220 msecs

My resume scripts did contain a hciconfig hci0 down followed by up, because
on my previous notebook (and the kernel I used at the time) it was needed for
BT to work after suspend. On this hardware, however, none of that is needed.
Bluetooth after suspend works regardless of whether that patch is applied or
not, and I believe it would wait indefinitely if given large enough timeout.

Aside from reverting the patch, doing the following before suspend also works
around the issue:
echo disable > /proc/acpi/ibm/bluetooth

Kind regards,
--
TomÃÅ JanouÅek, a.k.a. Liskni_si, http://work.lisk.in/
Bus 001 Device 006: ID 0a5c:217f Broadcom Corp. Bluetooth Controller
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 224 Wireless
bDeviceSubClass 1 Radio Frequency
bDeviceProtocol 1 Bluetooth
bMaxPacketSize0 64
idVendor 0x0a5c Broadcom Corp.
idProduct 0x217f Bluetooth Controller
bcdDevice 7.48
iManufacturer 1 Broadcom Corp
iProduct 2 Broadcom Bluetooth Device
iSerial 3 CCAF78EC8B4F
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 216
bNumInterfaces 4
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xe0
Self Powered
Remote Wakeup
MaxPower 0mA
Interface Descriptor:
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bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 3
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
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bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
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bInterval 1
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bInterval 1
Endpoint Descriptor:
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bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
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wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
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bInterfaceNumber 1
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bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
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bmAttributes 1
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wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Interface Descriptor:
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bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 1
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bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
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Endpoint Descriptor:
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bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
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wMaxPacketSize 0x0009 1x 9 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 2
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
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wMaxPacketSize 0x0011 1x 17 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0011 1x 17 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 3
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
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bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
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bInterval 1
Endpoint Descriptor:
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bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
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bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 4
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 5
bNumEndpoints 2
bInterfaceClass 224 Wireless
bInterfaceSubClass 1 Radio Frequency
bInterfaceProtocol 1 Bluetooth
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
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Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Endpoint Descriptor:
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bDescriptorType 5
bEndpointAddress 0x03 EP 3 OUT
bmAttributes 1
Transfer Type Isochronous
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wMaxPacketSize 0x0040 1x 64 bytes
bInterval 1
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
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bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 255 Vendor Specific Subclass
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iInterface 0
Endpoint Descriptor:
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bEndpointAddress 0x84 EP 4 IN
bmAttributes 2
Transfer Type Bulk
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Endpoint Descriptor:
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bmAttributes 2
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bInterval 1
Interface Descriptor:
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bDescriptorType 4
bInterfaceNumber 3
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 254 Application Specific Interface
bInterfaceSubClass 1 Device Firmware Update
bInterfaceProtocol 1
iInterface 0
Device Firmware Upgrade Interface Descriptor:
bLength 7
bDescriptorType 33
bmAttributes 7
Will Not Detach
Manifestation Tolerant
Upload Supported
Download Supported
wDetachTimeout 5000 milliseconds
wTransferSize 64 bytes
Device Status: 0x0001
Self Powered

Next message: Frederic Weisbecker: "Re: [PATCH v2] printk: add console output tracing"
Previous message: David Ahern: "[PATCH] perf script: Add comm filtering option"
Next in thread: Srivatsa S. Bhat: "Re: [REGRESSION] resume takes 10s longer due to e1b6eb3 (Bluetooth:Increase HCI reset timeout ...)"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]