From 91a7c58fce065506fd98954d27694e5d83c96638 Mon Sep 17 00:00:00 2001 From: Leon Romanovsky Date: Mon, 7 Sep 2020 15:09:13 +0300 Subject: RDMA: Restore ability to fail on PD deallocate The IB verbs objects are counted by the kernel and ib_core ensures that deallocate PD will success so it will be called once all other objects that depends on PD will be released. This is achieved by managing various reference counters on such objects. The mlx5 driver didn't follow this standard flow when allowed DEVX objects that are not managed by ib_core to be interleaved with the ones under ib_core responsibility. In such interleaved scenarios deallocate command can fail and ib_core will leave uobject in internal DB and attempt to clean it later to free resources anyway. This change partially restores returned value from dealloc_pd() for all drivers, but keeping in mind that non-DEVX devices and kernel verbs paths shouldn't fail. Fixes: 21a428a019c9 ("RDMA: Handle PD allocations by IB/core") Link: https://lore.kernel.org/r/20200907120921.476363-2-leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c | 5 +++-- drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h | 2 +- 2 files changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/infiniband/hw/vmw_pvrdma') diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c index 65ac3693ad12..678c94531e68 100644 --- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c +++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.c @@ -479,9 +479,9 @@ err: * @pd: the protection domain to be released * @udata: user data or null for kernel object * - * @return: 0 on success, otherwise errno. + * @return: Always 0 */ -void pvrdma_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) +int pvrdma_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) { struct pvrdma_dev *dev = to_vdev(pd->device); union pvrdma_cmd_req req = {}; @@ -498,6 +498,7 @@ void pvrdma_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata) ret); atomic_dec(&dev->num_pds); + return 0; } /** diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h index 699b20849a7e..7bf33a654275 100644 --- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h +++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h @@ -399,7 +399,7 @@ int pvrdma_mmap(struct ib_ucontext *context, struct vm_area_struct *vma); int pvrdma_alloc_ucontext(struct ib_ucontext *uctx, struct ib_udata *udata); void pvrdma_dealloc_ucontext(struct ib_ucontext *context); int pvrdma_alloc_pd(struct ib_pd *pd, struct ib_udata *udata); -void pvrdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata); +int pvrdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata); struct ib_mr *pvrdma_get_dma_mr(struct ib_pd *pd, int acc); struct ib_mr *pvrdma_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, u64 virt_addr, int access_flags, -- cgit v1.2.3-59-g8ed1b