Am Montag, 7. September 2009 17:00:30 schrieb Alan Stern: > On Mon, 7 Sep 2009, Oliver Neukum wrote: > > Am Samstag, 5. September 2009 19:50:19 schrieb Paul Martin: > > > cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and > > > ISDN adapters drivers/usb/class/cdc-acm.c: Entering acm_tty_open. > > > drivers/usb/class/cdc-acm.c: acm_control_msg: rq: 0x22 val: 0x3 len: > > > 0x0 result: 0 drivers/usb/class/cdc-acm.c: tty_port_block_til_ready > > > returned -512 > > > > This is very hard to explain. I can't see how tty_port_block_til_ready() > > can return -512 > > Are you using any non-standard patches? > > Alan, does this make sense to you?i I was actually referring to Alan Cox whom I had taken into cc. Sorry for being unclear. > No doubt it depends on which kernel is being used. In my kernel, for > instance, tty_port_block_til_ready() will return -ERESTARTSYS in > multiple places if a hangup or a signal occurs. Yes, but then it would work and user space knew it had to retry. -512 simply does not look like a valid error return. I must be even denser than usual. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
