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From: Lubomir Rintel <lkundrak@v3.sk>
To: Mark Brown <broonie@kernel.org>
Cc: Daniel Mack <daniel@zonque.org>,
	Haojian Zhuang <haojian.zhuang@gmail.com>,
	Robert Jarzmik <robert.jarzmik@free.fr>,
	linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org,
	Lubomir Rintel <lkundrak@v3.sk>
Subject: [PATCH] spi: pxa2xx: Balance runtime PM enable/disable on error
Date: Fri, 19 Jul 2019 14:27:13 +0200
Message-ID: <20190719122713.3444318-1-lkundrak@v3.sk> (raw)

Don't undo the PM initialization if we error out before we managed to
initialize it. The call to pm_runtime_disable() without being preceded
by pm_runtime_enable() would disturb the balance of the Force.

In practice, this happens if we fail to allocate any of the GPIOS ("cs",
"ready") due to -EPROBE_DEFER because we're getting probled before the
GPIO driver.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
---
 drivers/spi/spi-pxa2xx.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c
index fc7ab4b268802..22513caf20006 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1831,14 +1831,16 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	status = devm_spi_register_controller(&pdev->dev, controller);
 	if (status != 0) {
 		dev_err(&pdev->dev, "problem registering spi controller\n");
-		goto out_error_clock_enabled;
+		goto out_error_pm_runtime_enabled;
 	}
 
 	return status;
 
-out_error_clock_enabled:
+out_error_pm_runtime_enabled:
 	pm_runtime_put_noidle(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
+
+out_error_clock_enabled:
 	clk_disable_unprepare(ssp->clk);
 
 out_error_dma_irq_alloc:
-- 
2.21.0


             reply index

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-19 12:27 Lubomir Rintel [this message]
2019-07-22 12:22 ` Applied "spi: pxa2xx: Balance runtime PM enable/disable on error" to the spi tree Mark Brown

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