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Re: [PATCH] Fix kernel oops in failed chip_attach

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Christian Daudt <csd@xxxxxxxxxxxx> writes:

> When chip attach fails, brcmf_sdiod_intr_unregister is being called
> but that is too early as sdiodev->settings has not been set yet
> nor has brcmf_sdiod_intr_register been called.
> Change to use oob_irq_requested + newly created sd_irq_requested
> to decide on what to unregister at intr_unregister time.
>
> Steps to reproduce problem:
> - modprobe brcmfmac using buggy FW
> - rmmod brcmfmac
> - modprobe brcmfmac again.
>
> If done with a buggy firmware, brcm_chip_attach will fail on the
> 2nd modprobe triggering the call to intr_unregister and the
> kernel oops when attempting to de-reference sdiodev->settings->bus.sdio
> which has not yet been set.
>
> Signed-off-by: Christian Daudt <csd@xxxxxxxxxxxx>

Please use prefix "brcmfmac: " in the title.

-- 
Kalle Valo
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