linux-kernel - Re: [-, REGRESSION] mwifiex: don't enable/disable IRQ 0 during suspend/resume

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Message-Id: <20170215091436.24D3560C51@smtp.codeaurora.org>
Date:   Wed, 15 Feb 2017 09:14:36 +0000 (UTC)
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Brian Norris <briannorris@...omium.org>
Cc:     Amitkumar Karwar <akarwar@...vell.com>,
        Nishant Sarmukadam <nishants@...vell.com>,
        <linux-kernel@...r.kernel.org>, linux-wireless@...r.kernel.org,
        Rajat Jain <rajatja@...gle.com>,
        Brian Norris <briannorris@...omium.org>
Subject: Re: [-,
 REGRESSION] mwifiex: don't enable/disable IRQ 0 during suspend/resume

Brian Norris <briannorris@...omium.org> wrote:
> If we don't have an out-of-band wakeup IRQ configured through DT (as
> most platforms don't), then we fall out of this function with
> 'irq_wakeup == 0'. Other code (e.g., mwifiex_disable_wake() and
> mwifiex_enable_wake()) treats 'irq_wakeup >= 0' as a valid IRQ, and so
> we end up calling {enable,disable}_irq() on IRQ 0.
> 
> That seems bad, so let's not do that.
> 
> Same problem as fixed in this patch:
> 
> https://patchwork.kernel.org/patch/9531693/
> [PATCH v2 2/3] btmrvl: set irq_bt to -1 when failed to parse it
> 
> with the difference that:
> (a) this one is actually a regression and
> (b) this affects both device tree and non-device-tree systems
> 
> While fixing the regression, also drop the verbosity on the parse
> failure, so we don't see this when a DT node is present but doesn't have
> an interrupt property (this is perfectly legal):
> 
> [   21.999000] mwifiex_pcie 0000:01:00.0: fail to parse irq_wakeup from device tree
> 
> Fixes: 853402a00823 ("mwifiex: Enable WoWLAN for both sdio and pcie")
> Signed-off-by: Brian Norris <briannorris@...omium.org>
> Acked-by: Rajat Jain <rajatja@...gle.com>

Patch applied to wireless-drivers-next.git, thanks.

2447e2cad752 mwifiex: don't enable/disable IRQ 0 during suspend/resume

-- 
https://patchwork.kernel.org/patch/9567543/

Documentation about submitting wireless patches and checking status
from patchwork:

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches