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Message-ID: <20091104005432.3cdc924f@lxorguk.ukuu.org.uk>
Date: Wed, 4 Nov 2009 00:54:32 +0000
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: Nicolas Pitre <nico@...xnic.net>
Cc: Alan Cox <alan@...ux.intel.com>, linux-mmc@...r.kernel.org,
lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 00/11] Sort out sdio_uart - stage two
> >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.
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