From: Peng Fan Date: Fri, 28 Feb 2025 07:17:19 +0000 (+0800) Subject: dmaengine: fsl-edma: cleanup chan after dma_async_device_unregister X-Git-Tag: v6.15-rc1~75^2~7 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c9c59da76ce9cb3f215b66eb3708cda1134a5206;p=thirdparty%2Flinux.git dmaengine: fsl-edma: cleanup chan after dma_async_device_unregister There is kernel dump when do module test: sysfs: cannot create duplicate filename /devices/platform/soc@0/44000000.bus/44000000.dma-controller/dma/dma0chan0 __dma_async_device_channel_register+0x128/0x19c dma_async_device_register+0x150/0x454 fsl_edma_probe+0x6cc/0x8a0 platform_probe+0x68/0xc8 fsl_edma_cleanup_vchan will unlink vchan.chan.device_node, while dma_async_device_unregister needs the link to do __dma_async_device_channel_unregister. So need move fsl_edma_cleanup_vchan after dma_async_device_unregister to make sure channel could be freed. So clean up chan after dma_async_device_unregister to address this. Fixes: 6f93b93b2a1b ("dmaengine: fsl-edma: kill the tasklets upon exit") Reviewed-by: Frank Li Signed-off-by: Peng Fan Link: https://lore.kernel.org/r/20250228071720.3780479-1-peng.fan@oss.nxp.com Signed-off-by: Vinod Koul --- diff --git a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c index 760c9e3e374ca..7eb4d898434b0 100644 --- a/drivers/dma/fsl-edma-main.c +++ b/drivers/dma/fsl-edma-main.c @@ -802,9 +802,9 @@ static void fsl_edma_remove(struct platform_device *pdev) struct fsl_edma_engine *fsl_edma = platform_get_drvdata(pdev); fsl_edma_irq_exit(pdev, fsl_edma); - fsl_edma_cleanup_vchan(&fsl_edma->dma_dev); of_dma_controller_free(np); dma_async_device_unregister(&fsl_edma->dma_dev); + fsl_edma_cleanup_vchan(&fsl_edma->dma_dev); fsl_disable_clocks(fsl_edma, fsl_edma->drvdata->dmamuxs); }