Re: [PATCH 00/11] Sort out sdio_uart - stage two

[Alan Cox <alan@lxorguk.ukuu.org.uk>]

> >From what I can see, sdio_uart_open() and sdio_uart_activate() are 
> called on the first cat invocation, and then sdio_uart_close() and 
> sdio_uart_shutdown() when cat is stopped with ^C.  However neither 

I would have expected the cat to terminate when the port is unplugged
(and the uart remove method called - doing a hangup)

> sdio_uart_open() nor sdio_uart_activate() is ever called anymore with 
> any subsequent cat invocations until a reboot.  Some upper layer must 
> have taken upon itself to return -EIO to user space.

The first call into the driver is to sdio_uart_install which looks up the
port from tty->index and would blow up if for some reason the get method
failed.

Still digging.