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SubjectRe: [PATCH 8/8] ARM: tegra: HACK: remove set_irq_flags() from driver
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On Thu, Mar 1, 2012 at 8:26 PM, Alan Ott <alan@signal11.us> wrote:

> From: Arnd Bergmann <arnd@arndb.de>
>
> The driver should not call set_irq_flags itself, and
> cannot do this from a loadable module.
>
> Remove the call for now, which might break the driver
> but at least lets the kernel link again.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/usb/host/ehci-tegra.c |    1 -
>  1 files changed, 0 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-tegra.c b/drivers/usb/host/ehci-tegra.c
> index dbc7fe8..ab91f26 100644
> --- a/drivers/usb/host/ehci-tegra.c
> +++ b/drivers/usb/host/ehci-tegra.c
> @@ -729,7 +729,6 @@ static int tegra_ehci_probe(struct platform_device *pdev)
>                err = -ENODEV;
>                goto fail;
>        }
> -       set_irq_flags(irq, IRQF_VALID);

The kernel is full of this kind of stuff (drivers/mfd/twl4030-irq.c):

#ifdef CONFIG_ARM
/* ARM requires an extra step to clear IRQ_NOREQUEST, which it
* sets on behalf of every irq_chip. Also sets IRQ_NOPROBE.
*/
set_irq_flags(irq, IRQF_VALID);
#else
/* same effect on other architectures */
irq_set_noprobe(irq);
#endif
Can't we try to fix this for real instead of breaking the universe,
hehe :-)

Yours,
Linus Walleij
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