netdev - Re: DM9000_IRQ

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Message-ID: <3efb10970712111231r29f9fba1l3528d805d1009c52@mail.gmail.com>
Date:	Tue, 11 Dec 2007 21:31:03 +0100
From:	"Remy Bohmer" <linux@...mer.net>
To:	"Daniel Mack" <daniel@...aq.de>
Cc:	netdev@...r.kernel.org
Subject: Re: DM9000_IRQ_FLAGS

Hello Daniel,

This controller is also used on many other boards, like the e.g. Atmel
AT91sam9261-ek board. On that board on both the rising _and_ falling
edge an interrupt is generated.

I can test tomorrow if this patch leaves this board in tact, but
should the board-specific code not add this flag if it is required ?
By modifying this driver you will interfere the behavior of other
boards, and I do not know if there any level triggered types used.


Kind Regards,

Remy Bohmer


2007/12/11, Daniel Mack <daniel@...aq.de>:
> Hi,
>
> on Toradex' Colibri, a PXA270 based board with a DM9000 ethernet
> controller, this driver won't work due to unsuitable DM9000_IRQ_FLAGS.
> If I understood the code behind request_irq() correctly, it's not
> recommended to register an IRQ without any of the IRQT_* flags set.
>
> Is there any concerns about applying the patch below?
>
> Best regards,
> Daniel
>
> diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c
> index 3286d2a..6a20a54 100644
> --- a/drivers/net/dm9000.c
> +++ b/drivers/net/dm9000.c
> @@ -66,6 +66,7 @@
>  #include <linux/dm9000.h>
>  #include <linux/delay.h>
>  #include <linux/platform_device.h>
> +#include <linux/irq.h>
>
>  #include <asm/delay.h>
>  #include <asm/irq.h>
> @@ -113,7 +114,7 @@
>  #define writesl        outsl
>  #define DM9000_IRQ_FLAGS       (IRQF_SHARED | IRQF_TRIGGER_HIGH)
>  #else
> -#define DM9000_IRQ_FLAGS       IRQF_SHARED
> +#define DM9000_IRQ_FLAGS       (IRQF_SHARED | IRQT_RISING)
>  #endif
>
>  /*
> --
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