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

Per Forlin per.forlin at linaro.org
Tue Jun 7 02:41:20 EDT 2011

On 1 June 2011 17:59, Nicolas Pitre <nicolas.pitre at linaro.org> wrote:
> On Wed, 1 Jun 2011, Per Forlin wrote:
>> From: Per Forlin <per.forlin at 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.
> Given that the issue can be fixed locally to the libertas driver, I'd
> suggest not merging this series until truly unfixable issues come up, as
> Daniel said.
I agree too.


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