linux-kernel - Re: [PATCH] PCI: tegra: Convert struct tegra_msi mask

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Message-Id: <175881856680.391347.7490964130330685469.b4-ty@kernel.org>
Date: Thu, 25 Sep 2025 22:12:46 +0530
From: Manivannan Sadhasivam <mani@...nel.org>
To: linux-pci@...r.kernel.org, 
 Marek Vasut <marek.vasut+renesas@...lbox.org>
Cc: stable@...r.kernel.org, Geert Uytterhoeven <geert+renesas@...der.be>, 
 Krzysztof Wilczyński <kwilczynski@...nel.org>, 
 Bjorn Helgaas <bhelgaas@...gle.com>, Jonathan Hunter <jonathanh@...dia.com>, 
 Lorenzo Pieralisi <lpieralisi@...nel.org>, Rob Herring <robh@...nel.org>, 
 Thierry Reding <thierry.reding@...il.com>, linux-kernel@...r.kernel.org, 
 linux-tegra@...r.kernel.org
Subject: Re: [PATCH] PCI: tegra: Convert struct tegra_msi mask_lock into
 raw spinlock


On Mon, 22 Sep 2025 17:07:48 +0200, Marek Vasut wrote:
> The tegra_msi_irq_unmask() function may be called from a PCI driver
> request_threaded_irq() function. This triggers kernel/irq/manage.c
> __setup_irq() which locks raw spinlock &desc->lock descriptor lock
> and with that descriptor lock held, calls tegra_msi_irq_unmask().
> 
> Since the &desc->lock descriptor lock is a raw spinlock , and the
> tegra_msi .mask_lock is not a raw spinlock, this setup triggers
> 'BUG: Invalid wait context' with CONFIG_PROVE_RAW_LOCK_NESTING=y .
> 
> [...]

Applied, thanks!

[1/1] PCI: tegra: Convert struct tegra_msi mask_lock into raw spinlock
      commit: 39ec28d01d565030aa28d87a212d201c252c072e

Best regards,
-- 
Manivannan Sadhasivam <mani@...nel.org>