[Bug 88746] Re: ehci_hcd module causes I/O errors in USB 2.0 devices

Pi pi3832 at hotmail.com
Sat Jan 23 07:17:55 UTC 2010


So, if I run:

dmesg | grep ehci*

I get:

[    0.892115] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.892479] ehci_hcd 0000:00:02.1: PCI INT B -> Link[LUB2] -> GSI 22 (level, low) -> IRQ 22
[    0.892492] ehci_hcd 0000:00:02.1: setting latency timer to 64
[    0.892496] ehci_hcd 0000:00:02.1: EHCI Host Controller
[    0.892547] ehci_hcd 0000:00:02.1: new USB bus registered, assigned bus number 1
[    0.892571] ehci_hcd 0000:00:02.1: debug port 1
[    0.892575] ehci_hcd 0000:00:02.1: cache line size of 64 is not supported
[    0.892593] ehci_hcd 0000:00:02.1: irq 22, io mem 0xfeafec00
[    0.904018] ehci_hcd 0000:00:02.1: USB 2.0 started, EHCI 1.00
[    0.904459] ehci_hcd 0000:00:04.1: PCI INT B -> Link[UB12] -> GSI 21 (level, low) -> IRQ 21
[    0.904467] ehci_hcd 0000:00:04.1: setting latency timer to 64
[    0.904469] ehci_hcd 0000:00:04.1: EHCI Host Controller
[    0.904503] ehci_hcd 0000:00:04.1: new USB bus registered, assigned bus number 2
[    0.904524] ehci_hcd 0000:00:04.1: debug port 1
[    0.904528] ehci_hcd 0000:00:04.1: cache line size of 64 is not supported
[    0.904544] ehci_hcd 0000:00:04.1: irq 21, io mem 0xfeafe800
[    0.916016] ehci_hcd 0000:00:04.1: USB 2.0 started, EHCI 1.00
[    1.340016] usb 2-3: new high speed USB device using ehci_hcd and address 3
[ 4478.536017] usb 1-3: new high speed USB device using ehci_hcd and address 2
[ 6973.480021] usb 2-3: new high speed USB device using ehci_hcd and address 4
[ 6975.872018] usb 2-3: new high speed USB device using ehci_hcd and address 5
[10677.680020] usb 2-3: new high speed USB device using ehci_hcd and address 7
[12922.100581] usb 2-3: reset high speed USB device using ehci_hcd and address 7
[12958.113018] usb 2-3: reset high speed USB device using ehci_hcd and address 7
[12991.113026] usb 2-3: reset high speed USB device using ehci_hcd and address 7
[13030.113026] usb 2-3: reset high speed USB device using ehci_hcd and address 7
[...]
[16805.101018] usb 2-3: reset high speed USB device using ehci_hcd and address 7
[16840.101019] usb 2-3: reset high speed USB device using ehci_hcd and address 7
[16872.101024] usb 2-3: reset high speed USB device using ehci_hcd and address 7


But if I run:

modprobe -r ehci_hcd

I get:

FATAL: Module ehci_hcd not found.


Is my kernel (2.6.31-17) haunted by the ghost of this THREE YEAR OLD bug?

Also, changing 'scheduler' doesn't help.  Changing 'max_sectors' doesn't
help.

-- 
ehci_hcd module causes I/O errors in USB 2.0 devices
https://bugs.launchpad.net/bugs/88746
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