linux-kernel - [PATCH 1/2] spi: spi-cadence-quadspi: Enable pm runtime earlier to avoid imbalance

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Message-ID: <20251105161146.2019090-2-a-dutta@ti.com>
Date: Wed, 5 Nov 2025 21:41:45 +0530
From: Anurag Dutta <a-dutta@...com>
To: <broonie@...nel.org>, <khairul.anuar.romli@...era.com>, <vigneshr@...com>
CC: <u-kumar1@...com>, <s-k6@...com>, <linux-spi@...r.kernel.org>,
	<gehariprasath@...com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] spi: spi-cadence-quadspi: Enable pm runtime earlier to avoid imbalance

The "probe_setup_failed" label calls pm_runtime_disable(), but
pm_runtime_enable() was placed after a possible jump to this label.
When cqspi_setup_flash() fails, control jumps to the label without
pm_runtime_enable() being called, leading to unbalanced PM runtime
reference counting.

Move pm_runtime_enable() and associated calls above the first
possible branch to "probe_setup_failed" to ensure balanced
enable/disable calls across all error paths.

Fixes: 30dbc1c8d50f ("spi: cadence-qspi: defer runtime support on socfpga if reset bit is enabled")
Signed-off-by: Anurag Dutta <a-dutta@...com>
---
 drivers/spi/spi-cadence-quadspi.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 81017402bc56..56906dc76b34 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1981,6 +1981,13 @@ static int cqspi_probe(struct platform_device *pdev)
 	cqspi->current_cs = -1;
 	cqspi->sclk = 0;
 
+	if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) {
+		pm_runtime_enable(dev);
+		pm_runtime_set_autosuspend_delay(dev, CQSPI_AUTOSUSPEND_TIMEOUT);
+		pm_runtime_use_autosuspend(dev);
+		pm_runtime_get_noresume(dev);
+	}
+
 	ret = cqspi_setup_flash(cqspi);
 	if (ret) {
 		dev_err(dev, "failed to setup flash parameters %d\n", ret);
@@ -1998,13 +2005,6 @@ static int cqspi_probe(struct platform_device *pdev)
 			goto probe_dma_failed;
 	}
 
-	if (!(ddata && (ddata->quirks & CQSPI_DISABLE_RUNTIME_PM))) {
-		pm_runtime_enable(dev);
-		pm_runtime_set_autosuspend_delay(dev, CQSPI_AUTOSUSPEND_TIMEOUT);
-		pm_runtime_use_autosuspend(dev);
-		pm_runtime_get_noresume(dev);
-	}
-
 	ret = spi_register_controller(host);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register SPI ctlr %d\n", ret);
-- 
2.34.1