linux-kernel - Re: [PATCH] mmc: omap_hsmmc: fix wakeirq handling on removal

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Message-ID: <20180904221109.54604ebf@aktux>
Date:   Tue, 4 Sep 2018 22:11:09 +0200
From:   Andreas Kemnade <andreas@...nade.info>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Kishon <kishon@...com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Tony Lindgren <tony@...mide.com>,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: [PATCH] mmc: omap_hsmmc: fix wakeirq handling on removal

Hi,

On Tue, 4 Sep 2018 16:34:56 +0200
Ulf Hansson <ulf.hansson@...aro.org> wrote:

> On 2 September 2018 at 09:30, Andreas Kemnade <andreas@...nade.info> wrote:
> > after unbinding mmc I get things like this:
> > [  185.294067] mmc1: card 0001 removed
> > [  185.305206] omap_hsmmc 480b4000.mmc: wake IRQ with no resume: -13
> >
> > The wakeirq stays in /proc-interrupts
> >
> > rebinding shows this:
> > [  289.795959] genirq: Flags mismatch irq 112. 0000200a (480b4000.mmc:wakeup) vs. 0000200a (480b4000.mmc:wakeup)
> > [  289.808959] omap_hsmmc 480b4000.mmc: Unable to request wake IRQ
> > [  289.815338] omap_hsmmc 480b4000.mmc: no SDIO IRQ support, falling back to polling
> >
> > That bug seems to be introduced by switching from devm_request_irq()
> > to generic wakeirq handling.
> >
> > So let us cleanup at removal.
> >
> > Signed-off-by: Andreas Kemnade <andreas@...nade.info>
> > Fixes: 5b83b2234be6 ("mmc: omap_hsmmc: Change wake-up interrupt to use generic wakeirq")  
> 
> Applied for fixes, and added a stable tag, thanks!
> 
What also might be critical (still analyzing) of that patch I am fixing
is:
It keeps the wakeup irq also enabled when the sdio irq is disabled.

Regards,
Andreas 

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