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Message-ID: <20240227050308.js4stf4men446efh@dhruva>
Date: Tue, 27 Feb 2024 10:33:08 +0530
From: Dhruva Gole <d-gole@...com>
To: Mark Brown <broonie@...nel.org>
CC: Apurva Nandan <a-nandan@...com>,
Théo Lebrun
<theo.lebrun@...tlin.com>,
<linux-spi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Gregory CLEMENT
<gregory.clement@...tlin.com>,
Vladimir Kondratiev
<vladimir.kondratiev@...ileye.com>,
Thomas Petazzoni
<thomas.petazzoni@...tlin.com>,
Tawfik Bayouk <tawfik.bayouk@...ileye.com>, Nishanth <nm@...com>,
Vignesh <vigneshr@...com>
Subject: Re: [PATCH v4 0/4] spi: cadence-qspi: Fix runtime PM and system-wide
suspend
Hi,
On Feb 26, 2024 at 13:40:00 +0000, Mark Brown wrote:
> On Mon, Feb 26, 2024 at 01:27:57PM +0000, Mark Brown wrote:
> > On Mon, Feb 26, 2024 at 05:48:03PM +0530, Dhruva Gole wrote:
> > > On Feb 22, 2024 at 19:13:29 +0000, Mark Brown wrote:
>
> > [ 1.709414] Call trace:
> > [ 1.711852] __mutex_lock.constprop.0+0x84/0x540
> > [ 1.716460] __mutex_lock_slowpath+0x14/0x20
> > [ 1.720719] mutex_lock+0x48/0x54
> > [ 1.724026] spi_controller_suspend+0x30/0x7c
> > [ 1.728377] cqspi_suspend+0x1c/0x6c
> > [ 1.731944] pm_generic_runtime_suspend+0x2c/0x44
> > [ 1.736640] genpd_runtime_suspend+0xa8/0x254
>
> > (it's generally helpful to provide the most relevant section directly.)
>
> > The issue here appears to be that we've registered for runtime suspend
> > prior to registering the controller...
>
> Actually, no - after this series cqspi_suspend() is the system not
> runtime PM operation and should not be called from runtime suspend. How
> is that happening?
I tried dropping this entire series, it doesn't really solve the kernel
boot issues. Also this particular stack dump isn't easily reproducible
either. Perhaps this series may not be the rootcause, I will need some
more time to see what's breaking boot for us.
But for now this series seems to be in the clear. Will keep you posted
if I find anything funny here.
FYI- We're just using the arm64 defconfig and respective device DTs
--
Best regards,
Dhruva Gole <d-gole@...com>
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