Hi Greg,
commit 666224b43b4b ("spi: bcm2835: Release the DMA channel if probe
fails after dma_init") was not marked for stable but really should
have been. Here's a backport for 4.19:
-- >8 --
From: Peter Ujfalusi <peter.ujfalusi@xxxxxx>
Date: Thu, 12 Dec 2019 15:55:43 +0200
Subject: [PATCH] spi: bcm2835: Release the DMA channel if probe fails after
dma_init
[ 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@xxxxxx>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
Link: https://lore.kernel.org/r/20191212135550.4634-3-peter.ujfalusi@xxxxxx
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
[lukas: backport to 4.19-stable]
Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx>
---
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 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;
}
--
2.29.2
