From: Per Forlin <per.forlin@xxxxxxxxxx> Add quirk MMC_QUIRK_SDIO_IRQ_CCCR_INTX_0 to handle SDIO device that may have pending IRQ when none bits are set in CCCR_INTx. This IRQ issue was identified in the libertas sdio driver where the SDIO device seems to raise an interrupt even if there were none function bits in CCCR_INTx set. SDIO single irq feature will call irq handler directly in case of only one interrupt registered. It will not check the CCCR_INTx register and miss if the register is 0 and call the irq handler anyway. This IRQ issue is not defined by the SDIO spec. Use this quirk to work around this SDIO IRQ issue for a specific device. Signed-off-by: Per Forlin <per.forlin@xxxxxxxxxx> --- drivers/mmc/core/sdio_irq.c | 4 ++-- include/linux/mmc/card.h | 1 + 2 files changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c index 03ead02..df1e946 100644 --- a/drivers/mmc/core/sdio_irq.c +++ b/drivers/mmc/core/sdio_irq.c @@ -204,7 +204,8 @@ static void sdio_single_irq_set(struct mmc_card *card) int i; card->sdio_single_irq = NULL; - if ((card->host->caps & MMC_CAP_SDIO_IRQ) && + if (!(card->quirks & MMC_QUIRK_SDIO_IRQ_CCCR_INTX_0) && + (card->host->caps & MMC_CAP_SDIO_IRQ) && card->host->sdio_irqs == 1) for (i = 0; i < card->sdio_funcs; i++) { func = card->sdio_func[i]; @@ -301,4 +302,3 @@ int sdio_release_irq(struct sdio_func *func) return 0; } EXPORT_SYMBOL_GPL(sdio_release_irq); - diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 7b4fd7b..852021c 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -175,6 +175,7 @@ struct mmc_card { #define MMC_QUIRK_DISABLE_CD (1<<5) /* disconnect CD/DAT[3] resistor */ #define MMC_QUIRK_INAND_CMD38 (1<<6) /* iNAND devices have broken CMD38 */ #define MMC_QUIRK_BLK_NO_CMD23 (1<<7) /* Avoid CMD23 for regular multiblock */ +#define MMC_QUIRK_SDIO_IRQ_CCCR_INTX_0 (1<<7) /* SDIO card has IRQ even if CCCR_INTx is 0 */ unsigned int erase_size; /* erase size in sectors */ unsigned int erase_shift; /* if erase unit is power 2 */ -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html