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[1/2] spi: qup: Don't skip cleanup in remove's error path

Message ID 20230330210341.2459548-2-u.kleine-koenig@pengutronix.de
State Accepted
Commit 61f49171a43ab1f80c73c5c88c508770c461e0f2
Headers show
Series spi: qup: Convert to platform remove callback returning void | expand

Commit Message

Uwe Kleine-König March 30, 2023, 9:03 p.m. UTC 
Returning early in a platform driver's remove callback is wrong. In this
case the dma resources are not released in the error path. this is never
retried later and so this is a permanent leak. To fix this, only skip
hardware disabling if waking the device fails.

Fixes: 64ff247a978f ("spi: Add Qualcomm QUP SPI controller support")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 drivers/spi/spi-qup.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 678dc51ef017..205e54f157b4 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -1277,18 +1277,22 @@  static int spi_qup_remove(struct platform_device *pdev)
 	struct spi_qup *controller = spi_master_get_devdata(master);
 	int ret;
 
-	ret = pm_runtime_resume_and_get(&pdev->dev);
-	if (ret < 0)
-		return ret;
+	ret = pm_runtime_get_sync(&pdev->dev);
 
-	ret = spi_qup_set_state(controller, QUP_STATE_RESET);
-	if (ret)
-		return ret;
+	if (ret >= 0) {
+		ret = spi_qup_set_state(controller, QUP_STATE_RESET);
+		if (ret)
+			dev_warn(&pdev->dev, "failed to reset controller (%pe)\n",
+				 ERR_PTR(ret));
 
-	spi_qup_release_dma(master);
+		clk_disable_unprepare(controller->cclk);
+		clk_disable_unprepare(controller->iclk);
+	} else {
+		dev_warn(&pdev->dev, "failed to resume, skip hw disable (%pe)\n",
+			 ERR_PTR(ret));
+	}
 
-	clk_disable_unprepare(controller->cclk);
-	clk_disable_unprepare(controller->iclk);
+	spi_qup_release_dma(master);
 
 	pm_runtime_put_noidle(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);