Function at drivers/dma/virt-dma.h, line 184 References: drivers/dma/amba-pl08x.c, line 1535 drivers/dma/bcm2835-dma.c, line 528 drivers/dma/dma-axi-dmac.c, line 674 drivers/dma/dma-jz4780.c, line 771 drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c, line 366 drivers/dma/k3dma.c, line 365 drivers/dma/mediatek/mtk-uart-apdma.c, line 314 drivers/dma/moxart-dma.c, line 364 drivers/dma/owl-dma.c, line 1008 drivers/dma/pxa_dma.c, line 712 drivers/dma/qcom/bam_dma.c, line 546 drivers/dma/s3c24xx-dma.c, line 754 drivers/dma/sa11x0-dma.c, line 398 drivers/dma/sprd-dma.c, line 630 drivers/dma/stm32-dma.c, line 1205 drivers/dma/stm32-mdma.c, line 1476 drivers/dma/sun4i-dma.c, line 214 drivers/dma/sun6i-dma.c, line 1002 drivers/dma/tegra210-adma.c, line 675 drivers/dma/uniphier-mdmac.c, line 226 drivers/dma/virt-dma.h, line 184 drivers/dma/zx_dma.c, line 327