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

[Nicolas Pitre]

On Tue, 3 Nov 2009, Alan Cox wrote:

> With the bugs Nicolas reported hopefully now nailed.

Progress, but still not there yet.

I'm still using the same "cat /dev/ttySDIO0" test with a GPS card.

Yanking the card out does terminate the cat process properly.  Inserting 
the card back in and restarting cat always fails with:

	cat: /dev/ttySDIO0: Input/output error

The same thing occurs if I terminate cat with ^C instead of pulling the 
card out.

>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 
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.


Nicolas
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/