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dmaengine: axi-dmac: fix possible race in remove()

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commit 1bc31444209c8efae98cb78818131950d9a6f4d6 upstream.

We need to first free the IRQ before calling of_dma_controller_free().
Otherwise we could get an interrupt and schedule a tasklet while
removing the DMA controller.

Fixes: 0e3b67b348 ("dmaengine: Add support for the Analog Devices AXI-DMAC DMA controller")
Cc: [email protected]
Signed-off-by: Nuno Sa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Nuno Sa 2024-03-28 14:58:50 +01:00 • committed by Greg Kroah-Hartman
commit 4d35028fb0
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/dma-axi-dmac.c
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@ -947,8 +947,8 @@ static int axi_dmac_remove(struct platform_device *pdev)
{
struct axi_dmac *dmac = platform_get_drvdata(pdev);
of_dma_controller_free(pdev->dev.of_node);
free_irq(dmac->irq, dmac);
of_dma_controller_free(pdev->dev.of_node);
tasklet_kill(&dmac->chan.vchan.task);
dma_async_device_unregister(&dmac->dma_dev);
clk_disable_unprepare(dmac->clk);