mirror of https://gitee.com/openkylin/linux.git
b6c52c6345
The dmaengine core assumes that async DMA devices will only be removed when they not used anymore, or it assumes dma_async_device_unregister() will only be called by dma driver exit routines. But this assumption is not true for the IOAT driver, which calls dma_async_device_unregister() from ioat_remove(). So current IOAT driver doesn't support device hot-removal because it may cause system crash to hot-remove an inuse IOAT device. To support CPU socket hot-removal, all PCI devices, including IOAT devices embedded in the socket, will be hot-removed. The idea solution is to enhance the dmaengine core and IOAT driver to support hot-removal, but that's too hard. This patch implements a hack to disable IOAT devices under hotplug-capable CPU socket so it won't break socket hot-removal. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> |
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| .. | ||
| Makefile | ||
| dca.c | ||
| dma.c | ||
| dma.h | ||
| dma_v2.c | ||
| dma_v2.h | ||
| dma_v3.c | ||
| hw.h | ||
| pci.c | ||
| registers.h | ||