diff options
Diffstat (limited to 'drivers/mmc/core/sdio_irq.c')
| -rw-r--r-- | drivers/mmc/core/sdio_irq.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c index 69802351996..96f81237d75 100644 --- a/drivers/mmc/core/sdio_irq.c +++ b/drivers/mmc/core/sdio_irq.c @@ -34,6 +34,22 @@ static int process_sdio_pending_irqs(struct mmc_card *card) int i, ret, count; unsigned char pending; + /* + * Optimization, if there is only 1 function registered + * and IRQ:s are supported and currently enabled, then + * we can assume that this actually is an IRQ and we can + * call the registered IRQ handler directly without + * checking the CCCR registers. + */ + if ((card->host->caps & MMC_CAP_SDIO_IRQ) && + card->host->sdio_irqs && (card->sdio_funcs == 1)) { + struct sdio_func *func = card->sdio_func[0]; + 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", |