linux-kernel - [PATCH v1 1/2] spi: tegra20-slink: Put device into suspend on driver removal

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Message-Id: <20211023225951.14253-1-digetx@gmail.com>
Date:   Sun, 24 Oct 2021 01:59:50 +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 1/2] spi: tegra20-slink: 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-tegra20-slink.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-tegra20-slink.c b/drivers/spi/spi-tegra20-slink.c
index 33302f6b42d7..e6b16131edc2 100644
--- a/drivers/spi/spi-tegra20-slink.c
+++ b/drivers/spi/spi-tegra20-slink.c
@@ -1124,7 +1124,7 @@ static int tegra_slink_probe(struct platform_device *pdev)
 exit_pm_put:
 	pm_runtime_put(&pdev->dev);
 exit_pm_disable:
-	pm_runtime_disable(&pdev->dev);
+	pm_runtime_force_suspend(&pdev->dev);
 
 	tegra_slink_deinit_dma_param(tspi, false);
 exit_rx_dma_free:
@@ -1143,7 +1143,7 @@ static int tegra_slink_remove(struct platform_device *pdev)
 
 	free_irq(tspi->irq, tspi);
 
-	pm_runtime_disable(&pdev->dev);
+	pm_runtime_force_suspend(&pdev->dev);
 
 	if (tspi->tx_dma_chan)
 		tegra_slink_deinit_dma_param(tspi, false);
-- 
2.32.0