On Wed, 31 Oct 2012, Randy Dunlap wrote:

On 10/30/2012 11:26 PM, Stephen Rothwell wrote:

quoted

Hi all,

Changes since 20121030:

on x86_64:

drivers/built-in.o: In function `ehci_reset':
host.c:(.text+0x542a7e): undefined reference to `dbgp_reset_prep'
host.c:(.text+0x542b75): undefined reference to `dbgp_external_startup'
drivers/built-in.o: In function `ehci_bus_resume':
host.c:(.text+0x544705): undefined reference to `dbgp_reset_prep'
host.c:(.text+0x544731): undefined reference to `dbgp_external_startup'

Jan:

We all forgot about the chipidea driver.  It includes code from 
ehci-hcd in a rather unorthodox manner (see 
drivers/usb/chipidea/host.c).

Evidently we need to change your new test in
drivers/usb/early/ehci-dbgp.c to:

#if IS_ENABLED(CONFIG_USB_HCD_EHCI) || defined(CONFIG_USB_CHIPIDEA_HOST)

Upcoming changes to ehci-hcd will make this unnecessary in 3.8, but for 
now we need it.

Alan Stern

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