linux-kernel - Re: [PATCH 1/1] [bluetooth]: fix bug - kernel warning detected if built in Bluetooth CF driver

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Date:	Mon, 12 May 2008 15:10:28 +0200
From:	Marcel Holtmann <marcel@...tmann.org>
To:	Bryan Wu <cooloney@...nel.org>
Cc:	linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
	Michael Hennerich <michael.hennerich@...log.com>
Subject: Re: [PATCH 1/1] [bluetooth]: fix bug - kernel warning detected if
	built in Bluetooth CF driver

Hi Brian,

> https://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=2650
> 
> Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
> Signed-off-by: Bryan Wu <cooloney@...nel.org>
> ---
>  drivers/bluetooth/bluecard_cs.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/bluetooth/bluecard_cs.c b/drivers/bluetooth/bluecard_cs.c
> index bcf5792..3b330a0 100644
> --- a/drivers/bluetooth/bluecard_cs.c
> +++ b/drivers/bluetooth/bluecard_cs.c
> @@ -867,7 +867,7 @@ static int bluecard_probe(struct pcmcia_device *link)
>  
>  	link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
>  	link->io.NumPorts1 = 8;
> -	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
> +	link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING | IRQ_HANDLE_PRESENT;
>  	link->irq.IRQInfo1 = IRQ_LEVEL_ID;
>  
>  	link->irq.Handler = bluecard_interrupt;

all Bluetooth PCMCIA drivers use an exclusive IRQ:

bluecard_cs.c:	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
bt3c_cs.c:	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
btuart_cs.c:	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;
dtl1_cs.c:	link->irq.Attributes = IRQ_TYPE_EXCLUSIVE | IRQ_HANDLE_PRESENT;

There was a reason for that when these drivers where written. I am not
sure if it is still valid or not. Does anybody at least have tested that
the cards still work if you use a shared IRQ.

Regards

Marcel


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