[PATCH 5.4-stable] spi: bcm2835: Release the DMA channel if probe fails after dma_init

[PATCH 5.4-stable] spi: bcm2835: Release the DMA channel if probe fails after dma_init

[Lukas Wunner]

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 5.4-stable]
Signed-off-by: Lukas Wunner <lukas@wunner.de>
---
 drivers/spi/spi-bcm2835.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index 5bc97b22491c..56ee84e85bee 100644
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -1310,21 +1310,22 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
 			       dev_name(&pdev->dev), ctlr);
 	if (err) {
 		dev_err(&pdev->dev, "could not request IRQ: %d\n", err);
-		goto out_clk_disable;
+		goto out_dma_release;
 	}
 
 	err = spi_register_controller(ctlr);
 	if (err) {
 		dev_err(&pdev->dev, "could not register SPI controller: %d\n",
 			err);
-		goto out_clk_disable;
+		goto out_dma_release;
 	}
 
 	bcm2835_debugfs_create(bs, dev_name(&pdev->dev));
 
 	return 0;
 
-out_clk_disable:
+out_dma_release:
+	bcm2835_dma_release(ctlr, bs);
 	clk_disable_unprepare(bs->clk);
 	return err;
 }
-- 
2.29.2