From: Per Forlin per.forlin@linaro.org
Daniel Drake reported an issue in the libertas sdio client that was triggered by the sdio_single_irq functionality. His SDIO device seems to raise an interrupt even though there are no bits set in the CCCR_INTx register. This behaviour is not supported by the sdio_single_irq feature nor the SDIO spec. The purpose of the sdio_single_irq feature is to avoid the overhead of checking the CCCR_INTx registers, this result in no error handling of the case if there is a pending IRQ with none CCCR_INTx bits set.
This patchset adds a quirk to support this spurious IRQ issue and also report a warning if an SDIO interrupt is raised but none CCCR_INTx bits are set.
Changes since v1: * Replace public sdio function to enable disable SDIO single IRQ function with a quirk
Per Forlin (2): sdio: add quirk to handle pending IRQ in case of none CCCR_INTx bits sdio: report error if pending IRQ but none CCCR_INTx bits
drivers/mmc/core/sdio_irq.c | 9 +++++++-- include/linux/mmc/card.h | 1 + 2 files changed, 8 insertions(+), 2 deletions(-)