DW eDMA driver private data is preserved in the passed DW eDMA chip info structure. If either probe procedure failed or for some reason the passed info object doesn't have private data pointer initialized we need to halt the DMA device cleanup procedure in order to prevent possible system crashes. Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx> Acked-by: Vinod Koul <vkoul@xxxxxxxxxx> --- drivers/dma/dw-edma/dw-edma-core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c index e3671bfbe186..1906a836f0aa 100644 --- a/drivers/dma/dw-edma/dw-edma-core.c +++ b/drivers/dma/dw-edma/dw-edma-core.c @@ -1011,6 +1011,10 @@ int dw_edma_remove(struct dw_edma_chip *chip) struct dw_edma *dw = chip->dw; int i; + /* Skip removal if no private data found */ + if (!dw) + return -ENODEV; + /* Disable eDMA */ dw_edma_v0_core_off(dw); -- 2.38.1
