[PATCH v2 0/2] sdio: add quirk for spurious SDIO IRQ

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Per Forlin <per.forlin@xxxxxxxxxx>

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(-)

-- 
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


[Index of Archives]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux