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SubjectRe: [PATCH] powerpc/fsl: Use irq_data_get_irq_handler_data() in chain handler
On Wed, 1 Jun 2011, Geert Uytterhoeven wrote:

> If you already have a pointer to a struct irq_data , it's more efficient
> to use irq_data_get_irq_handler_data().
> irq_get_handler_data() has to look up the struct irq_desc pointer again,
> which was already passed to the chain handler.
>
> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
> ---
> Completely untested, not even compile-tested.
> If this is correct, there are probably more of these?
>
> arch/powerpc/sysdev/fsl_msi.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
> index 92e7833..9b92c82 100644
> --- a/arch/powerpc/sysdev/fsl_msi.c
> +++ b/arch/powerpc/sysdev/fsl_msi.c
> @@ -193,7 +193,7 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc)
> u32 have_shift = 0;
> struct fsl_msi_cascade_data *cascade_data;
>
> - cascade_data = irq_get_handler_data(irq);
> + cascade_data = irq_data_get_irq_handler_data(idata);

cascade_data = irq_desc_get_handler_data(desc);

Might compile and work :)



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