linux-kernel - Re: [PATCH] iwlwifi: Fix softirq/hardirq disabling in iwl_pcie_enqueue

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Date:   Sat, 13 Mar 2021 19:35:44 +0200
From:   Luca Coelho <luca@...lho.fi>
To:     Kalle Valo <kvalo@...eaurora.org>
Cc:     Jiri Kosina <jikos@...nel.org>,
        Johannes Berg <johannes.berg@...el.com>,
        Emmanuel Grumbach <emmanuel.grumbach@...el.com>,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iwlwifi: Fix softirq/hardirq disabling in
 iwl_pcie_enqueue_hcmd()

On Sat, 2021-03-13 at 19:06 +0200, Kalle Valo wrote:
> Luca Coelho <luca@...lho.fi> writes:
> 
> > On Sat, 2021-03-13 at 16:43 +0100, Jiri Kosina wrote:
> > > On Sat, 13 Mar 2021, Kalle Valo wrote:
> > > 
> > > > > > > From: Jiri Kosina <jkosina@...e.cz>
> > > > > > > 
> > > > > > > It's possible for iwl_pcie_enqueue_hcmd() to be called with hard IRQs 
> > > > > > > disabled (e.g. from LED core). We can't enable BHs in such a situation.
> > > > > > > 
> > > > > > > Turn the unconditional BH-enable/BH-disable code into 
> > > > > > > hardirq-disable/conditional-enable.
> > > > > > > 
> > > > > > > This fixes the warning below.
> > > > > > 
> > > > > > Hi,
> > > > > > 
> > > > > > friendly ping on this one ... 
> > > > > 
> > > > > Luca,
> > > > > 
> > > > > Johannes is telling me that he merged this patch internally, but I have no 
> > > > > idea what is happening to it ... ?
> > > > > 
> > > > > The reported splat is a clear bug, so it should be fixed one way or the 
> > > > > other.
> > > > 
> > > > Should I take this to wireless-drivers?
> > > 
> > > I can't speak for the maintainers, but as far as I am concerned, it 
> > > definitely is a 5.12 material, as it fixes real scheduling bug.
> > 
> > Yes, please take this to w-d.  We have a similar patch internally, but
> > there's a backlog and it will take me some time to get to it.  I'll
> > resolve eventual conflicts when time comes.
> 
> Ok, can I have your ack for patchwork?

Sorry, forgot that.

Acked-by: Luca Coelho <luciano.coelho@...el.com>

--
Cheers,
Luca.