Re: musb_hdrc: usb_disconnect is not called when the USB device is disconnected.

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2010/7/14 Gadiyar, Anand <gadiyar@xxxxxx>:
> Enric Balletbò i Serra
>> Hello,
>>
>> When I disconnect an USB pendrive using twl4030 otg as host (step 2)
>> the usb_disconnect function is not called. OTOH if I reconnect the
>> device (step 3), then the usb_disconnect function is called.
>>
>> Does anyone have any ideas why usb_disconnect is not called when the
>> device is removed?
>>
>
> Which kernel version is this? Can you check if this patch fixes the behavior?
>
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7d9645fdca444d53907b22a4b73e3967efe09781

I'm using stable kernel 2.6.33.6

And yes this patch is not applied in this version. I applied and
solves the issue. Thank you very much.

Best regards,
-- Enric

>
> - Anand
>
>
>> Steps to see the feature:
>>
>> Step 1 : Plug a USB pendrive:
>> [ 2116.491546] usb 1-1: new high speed USB device using musb_hdrc and address 6
>> [ 2116.751861] usb 1-1: New USB device found, idVendor=058f, idProduct=6387
>> [ 2116.758697] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>> [ 2116.765899] usb 1-1: Product: Mass Storage
>> [ 2116.770019] usb 1-1: Manufacturer: 2.0
>> [ 2116.773834] usb 1-1: SerialNumber: A15B7B60
>> [ 2116.786468] scsi4 : usb-storage 1-1:1.0
>> [ 2117.797332] scsi 4:0:0:0: Direct-Access     2.0      Flash Disk  8.07 PQ: 0 ANSI: 2
>> [ 2117.813293] sd 4:0:0:0: [sda] 1968128 512-byte logical blocks: (1.00 GB/961 MiB)
>> [ 2117.829040] sd 4:0:0:0: [sda] Write Protect is off
>> [ 2117.834014] sd 4:0:0:0: [sda] Mode Sense: 03 00 00 00
>> [ 2117.834014] sd 4:0:0:0: [sda] Assuming drive cache: write through
>> [ 2117.849212] sd 4:0:0:0: [sda] Assuming drive cache: write through
>> [ 2117.856597]  sda: sda1
>> [ 2117.965698] sd 4:0:0:0: [sda] Assuming drive cache: write through
>> [ 2117.971954] sd 4:0:0:0: [sda] Attached SCSI removable disk
>> [ 2118.738769] FAT: bogus number of reserved sectors
>> [ 2118.743621] VFS: Can't find a valid FAT filesystem on dev sda.
>>
>> Step 2: Unplug the USB pendrive
>>
>> [ nothing here ]
>>
>> Step 3: Plug the USB pendrive:
>> [ 2218.820556] usb 1-1: USB disconnect, address 6
>> [ 2219.139831] usb 1-1: new high speed USB device using musb_hdrc and address 7
>> [ 2219.400146] usb 1-1: New USB device found, idVendor=058f, idProduct=6387
>> [ 2219.406951] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
>> [ 2219.414184] usb 1-1: Product: Mass Storage
>> [ 2219.418304] usb 1-1: Manufacturer: 2.0
>> [ 2219.422119] usb 1-1: SerialNumber: A15B7B60
>> [ 2219.434875] scsi5 : usb-storage 1-1:1.0
>> [ 2220.445770] scsi 5:0:0:0: Direct-Access     2.0      Flash Disk  8.07 PQ: 0 ANSI: 2
>> [ 2220.461547] sd 5:0:0:0: [sda] 1968128 512-byte logical blocks:(1.00 GB/961 MiB)
>> [ 2220.476379] sd 5:0:0:0: [sda] Write Protect is off
>> [ 2220.481323] sd 5:0:0:0: [sda] Mode Sense: 03 00 00 00
>> [ 2220.481323] sd 5:0:0:0: [sda] Assuming drive cache: write through
>> [ 2220.497314] sd 5:0:0:0: [sda] Assuming drive cache: write through
>> [ 2220.504516]  sda: sda1
>> [ 2220.603790] sd 5:0:0:0: [sda] Assuming drive cache: write through
>> [ 2220.610015] sd 5:0:0:0: [sda] Attached SCSI removable disk
>> [ 2221.378570] FAT: bogus number of reserved sectors
>> [ 2221.383453] VFS: Can't find a valid FAT filesystem on dev sda.
>>
>
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