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 intends to resolve the libertas issue by making sdio_single_irq feature configurable and also report a warning if an SDIO interrupt is raised but none CCCR_INTx bits are set. Per Forlin (2): sdio: add function to enable and disable sdio_single_irq optimization sdio: report error if pending IRQ but none function bits drivers/mmc/core/sdio_irq.c | 22 +++++++++++++++++++++- include/linux/mmc/card.h | 1 + 2 files changed, 22 insertions(+), 1 deletions(-) -- 1.7.4.1 _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
