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[109.252.192.83]) by smtp.gmail.com with ESMTPSA id 82sm409715lfb.12.2020.11.04.05.26.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Nov 2020 05:26:44 -0800 (PST) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Laxman Dewangan , Bartosz Golaszewski , Linus Walleij , Peter Geis Cc: linux-tegra@vger.kernel.org, linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 1/2] gpio: tegra: Add lockdep class Date: Wed, 4 Nov 2020 16:26:23 +0300 Message-Id: <20201104132624.17168-1-digetx@gmail.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Add lockdep class in order to fix debug warnings that are coming from a legit nested use of irq_set_irq_wake() by the Tegra GPIO driver. WARNING: possible recursive locking detected ... (irq_set_irq_wake) from (tegra_gpio_irq_set_wake) (tegra_gpio_irq_set_wake) from (irq_set_irq_wake) (irq_set_irq_wake) from (brcmf_sdiod_intr_register [brcmfmac]) ... Tested-by: Peter Geis Reported-by: Peter Geis Signed-off-by: Dmitry Osipenko --- drivers/gpio/gpio-tegra.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index 86568154cdb3..98fc78739ebf 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -560,6 +560,9 @@ static const struct dev_pm_ops tegra_gpio_pm_ops = { SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume) }; +static struct lock_class_key gpio_lock_class; +static struct lock_class_key gpio_request_class; + static int tegra_gpio_probe(struct platform_device *pdev) { struct tegra_gpio_info *tgi; @@ -661,6 +664,7 @@ static int tegra_gpio_probe(struct platform_device *pdev) bank = &tgi->bank_info[GPIO_BANK(gpio)]; irq_set_chip_data(irq, bank); + irq_set_lockdep_class(irq, &gpio_lock_class, &gpio_request_class); irq_set_chip_and_handler(irq, &tgi->ic, handle_simple_irq); }