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Message-ID: <46E86AD3.7030204@rtr.ca>
Date: Wed, 12 Sep 2007 18:40:19 -0400
From: Mark Lord <lkml@....ca>
To: Dan Zwell <dzwell@...il.com>
Cc: Alan Stern <stern@...land.harvard.edu>,
Oliver Neukum <oliver@...kum.org>,
Tino Keitel <tino.keitel@....de>,
David Brownell <david-b@...bell.net>,
linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Greg KH <gregkh@...e.de>
Subject: Re: 2.6.23-rc1: USB hard disk broken (REGRESSION)
Mark Lord wrote:
> Dan Zwell wrote:
>> Alan Stern wrote:
>>>> [ 126.512815] usb 1-1: usb auto-resume
>>>> [ 126.543447] uhci_hcd 0000:00:1f.2: port 1 portsc 00a5,01
>>>> [ 126.559426] usb 1-1: finish resume
>>>> [ 126.561435] usb 1-1: gone after usb resume? status -19
>>>> [ 126.561445] usb 1-1: can't resume, status -19
>>>> [ 126.561451] hub 1-0:1.0: logical disconnect on port 1
>>>> [ 126.562486] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR
>>>> driverbyte=DRIVER_OK,SUGGEST_OK
>>>
>>> This suggests a bug in the device's firmware, probably it sends a
>>> 1-byte Device-Status reply instead of a 2-byte reply as required by
>>> the USB spec. You could find out for certain by using usbmon.
>>>
>>> But if that is indeed the problem, the patch below should help. I've
>>> seen it before; perhaps we should adopt this workaround permanently.
>>>
>>>> Relevant info:
>>>> -obviously, I'm using uhci
>>>> -the drive is SATA, connected to USB with a SATA/IDE to USB adapter
>>>> -this problem does not occur with a USB flash drive
>>>> -reverting the commit that introduced auto-suspend prevents this error.
>>>
>>> If necessary you could disable autosuspend for your drive. But first
>>> test this patch.
>>>
>>> Alan Stern
>>>
>>>
>>>
>>> Index: 2.6.23-rc1/drivers/usb/core/hub.c
>>> ===================================================================
>>> --- 2.6.23-rc1.orig/drivers/usb/core/hub.c
>>> +++ 2.6.23-rc1/drivers/usb/core/hub.c
>>> @@ -1644,9 +1644,10 @@ static int finish_port_resume(struct usb
>>> * and device drivers will know about any resume quirks.
>>> */
>>> if (status == 0) {
>>> + devstatus = 0;
>>> status = usb_get_status(udev, USB_RECIP_DEVICE, 0, &devstatus);
>>> if (status >= 0)
>>> - status = (status == 2 ? 0 : -ENODEV);
>>> + status = (status > 0 ? 0 : -ENODEV);
>>> }
>>>
>>> if (status) {
>>>
>>>
>>
>> Alan,
>>
>> Yes, that patch worked, and dmesg now shows the device auto-suspending
>> and resuming every few seconds. Thanks a lot. I hope you do merge this
>> patch or a workaround like it.
>>
>> Dan
>
> The same bug kills my Sandisk Cruzer Micro USB pen drives.
> I plug them in, they work briefly, then the light goes out (abnormal),
> and 30-second timeout/reset is needed for each subsequent access. Ugh.
>
> They work fine in 2.6.22. I'll try the above patch here now and see if
> it fixes
> this regression.
Nope. Patch is already in -rc6 I see, so still NFG.
We can continue blacklisting the multitudes of b0rked devices one by one,
or we can revert this change or default it to "off" for usb-storage (at least).
This really kills a lot of everyday devices. Here's my Sandisk Cruzer(s),
after forcing autosuspend=0:
Bus 005 Device 014: ID 0781:5151 SanDisk Corp. Cruzer Micro 256/512MB Flash Drive
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x0781 SanDisk Corp.
idProduct 0x5151 Cruzer Micro 256/512MB Flash Drive
bcdDevice 0.10
iManufacturer 1 SanDisk Corporation
iProduct 2 Cruzer Micro
iSerial 3 20060775000CF73334D3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 32
bNumInterfaces 1
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 200mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 8 Mass Storage
bInterfaceSubClass 6 SCSI
bInterfaceProtocol 80 Bulk (Zip)
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x01 EP 1 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 1
Device Qualifier (for other device speed):
bLength 10
bDescriptorType 6
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
bNumConfigurations 1
Device Status: 0x0000
(Bus Powered)
-
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