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[4.9-stable,5/5] spi: bcm2835: Release the DMA channel if probe fails after dma_init

Message ID 43e6aab6ac72a313046cf2db3b823db32a71a885.1607258638.git.lukas@wunner.de
State Superseded
Headers show
Series [4.9-stable,1/5] spi: Introduce device-managed SPI controller allocation | expand

Commit Message

Lukas Wunner Dec. 6, 2020, 12:46 p.m. UTC 
From: Peter Ujfalusi <peter.ujfalusi@ti.com>


[ Upstream commit 666224b43b4bd4612ce3b758c038f9bc5c5e3fcb ]

The DMA channel was not released if either devm_request_irq() or
devm_spi_register_controller() failed.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>

Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

Link: https://lore.kernel.org/r/20191212135550.4634-3-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>

[lukas: backport to 4.19-stable]
Signed-off-by: Lukas Wunner <lukas@wunner.de>

---
 drivers/spi/spi-bcm2835.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

-- 
2.29.2
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Patch

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 2908df35466f..6824beae18e4 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -787,18 +787,19 @@  static int bcm2835_spi_probe(struct platform_device *pdev)
 			       dev_name(&pdev->dev), master);
 	if (err) {
 		dev_err(&pdev->dev, "could not request IRQ: %d\n", err);
-		goto out_clk_disable;
+		goto out_dma_release;
 	}
 
 	err = spi_register_master(master);
 	if (err) {
 		dev_err(&pdev->dev, "could not register SPI master: %d\n", err);
-		goto out_clk_disable;
+		goto out_dma_release;
 	}
 
 	return 0;
 
-out_clk_disable:
+out_dma_release:
+	bcm2835_dma_release(master);
 	clk_disable_unprepare(bs->clk);
 	return err;
 }