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SubjectRe: [PATCH] sdio: optimized SDIO IRQ handling for single function
On Tue, 3 May 2011, Per Forlin wrote:

> From: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
>
> If there is only 1 function registered, and IRQ:s are supported and
> currently enabled, call the callback handler directly
> without checking the CCCR registers.
>
> Signed-off-by: Stefan Nilsson XK <stefan.xk.nilsson@stericsson.com>
> Signed-off-by: Per Forlin <per.forlin@linaro.org>

Acked-by: Nicolas Pitre <nicolas.pitre@linaro.org>

> ---
> drivers/mmc/core/sdio_irq.c | 14 ++++++++++++++
> 1 files changed, 14 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
> index b300161..25291bf 100644
> --- a/drivers/mmc/core/sdio_irq.c
> +++ b/drivers/mmc/core/sdio_irq.c
> @@ -32,6 +32,20 @@ static int process_sdio_pending_irqs(struct mmc_card *card)
> int i, ret, count;
> unsigned char pending;
>
> + /*
> + * If there is only 1 function registered
> + * call irq directly without checking the CCCR registers.
> + */
> + if ((card->host->caps & MMC_CAP_SDIO_IRQ) &&
> + card->host->sdio_irqs && (card->sdio_funcs == 1))
> + for (i = 0; i < SDIO_MAX_FUNCS; i++) {
> + struct sdio_func *func = card->sdio_func[i];
> + if (func && func->irq_handler) {
> + func->irq_handler(func);
> + return 1;
> + }
> + }
> +
> ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending);
> if (ret) {
> printk(KERN_DEBUG "%s: error %d reading SDIO_CCCR_INTx\n",
> --
> 1.7.4.1
>
>
> _______________________________________________
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> linaro-dev@lists.linaro.org
> http://lists.linaro.org/mailman/listinfo/linaro-dev
>


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