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@ti.com 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@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(-)
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; }