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Message-ID: <20091103141723.21c2bea1@lxorguk.ukuu.org.uk>
Date: Tue, 3 Nov 2009 14:17:23 +0000
From: Alan Cox <alan@...rguk.ukuu.org.uk>
To: David Vrabel <david.vrabel@....com>
Cc: Nicolas Pitre <nico@...xnic.net>, Alan Cox <alan@...ux.intel.com>,
linux-mmc@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
dhowells@...hat.com
Subject: Re: [PATCH 0/6] Clean up the sdio_uart driver and fix the tty code
> > sdio_uart_irq
> > sdio_uart_port_remove
> > port->func = NULL;
> > sdio_in
> > BUG_ON
>
> This is actually happening? sdio_claim_host()/sdio_release_host() act
Found by inspection
> like a mutex so sdio_uart_port_remove() will wait in sdio_claim_host()
> until sdio_uart_irq() returns (SDIO interrupt handlers are called with
> the host claimed).
Ok that was a detail I was missing. That part of the locking now makes
sense.
Ok so I think I have it fixed up barring stuff which is "feature add" -
such as implementing TIOCMIWAIT and blocking on no carrier.
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