linux-kernel - [PATCH 4.19 062/267] spi: pxa2xx: Balance runtime PM enable/disable on error

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Message-Id: <20200619141651.852981946@linuxfoundation.org>
Date:   Fri, 19 Jun 2020 16:30:47 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Lubomir Rintel <lkundrak@...sk>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.19 062/267] spi: pxa2xx: Balance runtime PM enable/disable on error

From: Lubomir Rintel <lkundrak@...sk>

[ Upstream commit 1274204542f683e1d8491ebe9cc86284d5a8ebcc ]

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@...sk>
Link: https://lore.kernel.org/r/20190719122713.3444318-1-lkundrak@v3.sk
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 d6c30bd1583f..6551188fea23 100644
--- a/drivers/spi/spi-pxa2xx.c
+++ b/drivers/spi/spi-pxa2xx.c
@@ -1742,14 +1742,16 @@ static int pxa2xx_spi_probe(struct platform_device *pdev)
 	status = spi_register_controller(master);
 	if (status != 0) {
 		dev_err(&pdev->dev, "problem registering spi master\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:
-- 
2.25.1