linux-kernel - [PATCH v1 2/2] spi: tegra210-quad: Put device into suspend on driver removal

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Message-Id: <20211023225951.14253-2-digetx@gmail.com>
Date:   Sun, 24 Oct 2021 01:59:51 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <treding@...dia.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Mark Brown <broonie@...nel.org>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Sowjanya Komatineni <skomatineni@...dia.com>
Cc:     linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: [PATCH v1 2/2] spi: tegra210-quad: Put device into suspend on driver removal

pm_runtime_disable() cancels all pending power requests, while they
should be completed for the Tegra SPI driver. Otherwise SPI clock won't
be disabled ever again because clk refcount will become unbalanced.
Enforce runtime PM suspension to put device into expected state before
driver is unbound and device's RPM state is reset by driver's core.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/spi/spi-tegra210-quad.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-tegra210-quad.c b/drivers/spi/spi-tegra210-quad.c
index 2354ca1e3858..c0f9a75b44b5 100644
--- a/drivers/spi/spi-tegra210-quad.c
+++ b/drivers/spi/spi-tegra210-quad.c
@@ -1318,7 +1318,7 @@ static int tegra_qspi_probe(struct platform_device *pdev)
 exit_free_irq:
 	free_irq(qspi_irq, tqspi);
 exit_pm_disable:
-	pm_runtime_disable(&pdev->dev);
+	pm_runtime_force_suspend(&pdev->dev);
 	tegra_qspi_deinit_dma(tqspi);
 	return ret;
 }
@@ -1330,7 +1330,7 @@ static int tegra_qspi_remove(struct platform_device *pdev)
 
 	spi_unregister_master(master);
 	free_irq(tqspi->irq, tqspi);
-	pm_runtime_disable(&pdev->dev);
+	pm_runtime_force_suspend(&pdev->dev);
 	tegra_qspi_deinit_dma(tqspi);
 
 	return 0;
-- 
2.32.0