Re: [REGRESSION] "USB: use kfifo to buffer usb-generic serialwrites" causes gobi_loader to hang

From: Alan Cox
Date: Tue Jan 19 2010 - 09:25:38 EST

> The log shows no call to usb_serial_generic_write_room()
> Do you consider this a bug in the tty layer?

Actually this all makes sense because of where it was hanging. A reply of
0 to the tty->ops->write will cause it to either return (O_NONBLOCK) or
sleep in the n_tty write code waiting for a write_wait wakeup

So the fix does indeed look correct.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at