linux-kernel - [PATCH 4.4 33/39] spi: bcm2835: Release the DMA channel if probe fails after dma

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Date:   Thu, 10 Dec 2020 15:26:44 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Peter Ujfalusi <peter.ujfalusi@...com>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Mark Brown <broonie@...nel.org>, Lukas Wunner <lukas@...ner.de>
Subject: [PATCH 4.4 33/39] spi: bcm2835: Release the DMA channel if probe fails after dma_init

From: Peter Ujfalusi <peter.ujfalusi@...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@...com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Link: https://lore.kernel.org/r/20191212135550.4634-3-peter.ujfalusi@ti.com
Signed-off-by: Mark Brown <broonie@...nel.org>
[lukas: backport to 4.19-stable]
Signed-off-by: Lukas Wunner <lukas@...ner.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/spi/spi-bcm2835.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -792,18 +792,19 @@ static int bcm2835_spi_probe(struct plat
 			       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;
 }