Eli Cohen 08dbd56602 vdpa/mlx5: Avoid destroying MR on empty iotlb ... The current code treats an empty iotlb provdied in set_map() as a special case and destroy the memory region object. This must not be done since the virtqueue objects reference this MR. Doing so will cause the driver unload to emit errors and log timeouts caused by the firmware complaining on busy resources. This patch treats an empty iotlb as any other change of mapping. In this case, mlx5_vdpa_create_mr() will fail and the entire set_map() call to fail. This issue has not been encountered before but was seen to occur in a non-official version of qemu. Since qemu is a userspace program, the driver must protect against such case. Fixes: 94abbccdf2 ("vdpa/mlx5: Add shared memory registration code") Signed-off-by: Eli Cohen <elic@nvidia.com> Link: https://lore.kernel.org/r/20210811053713.66658-1-elic@nvidia.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>		2021-08-11 06:44:41 -04:00
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ifcvf	vDPA/ifcvf: Fix return value check for vdpa_alloc_device()	2021-08-11 06:44:23 -04:00
mlx5	vdpa/mlx5: Avoid destroying MR on empty iotlb	2021-08-11 06:44:41 -04:00
vdpa_sim	vdpa_sim: Fix return value check for vdpa_alloc_device()	2021-08-11 06:44:23 -04:00
virtio_pci	vp_vdpa: Fix return value check for vdpa_alloc_device()	2021-08-11 06:44:23 -04:00
Kconfig	vdpa: add vdpa simulator for block device	2021-05-03 04:55:53 -04:00
Makefile	vdpa: introduce virtio pci driver	2021-05-03 04:55:51 -04:00
vdpa.c	vdpa: Follow kdoc comment style	2021-05-03 04:55:51 -04:00