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nvme-rdma: fix double freeing of async event data 

Some error paths in configuration of admin queue free data buffer
associated with async request SQE without resetting the data buffer
pointer to NULL, This buffer is also freed up again if the controller
is shutdown or reset.

Signed-off-by: Prabhath Sajeepa <psajeepa@purestorage.com>
Reviewed-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Prabhath Sajeepa 2018-11-28 11:11:29 -07:00 committed by Christoph Hellwig
parent f6c8e432cb
commit 6344d02dc8
1 changed files with 2 additions and 0 deletions
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2
drivers/nvme/host/rdma.c
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@ -184,6 +184,7 @@ static int nvme_rdma_alloc_qe(struct ib_device *ibdev, struct nvme_rdma_qe *qe,
qe->dma = ib_dma_map_single(ibdev, qe->data, capsule_size, dir);
if (ib_dma_mapping_error(ibdev, qe->dma)) {
kfree(qe->data);
qe->data = NULL;
return -ENOMEM;
}
@ -823,6 +824,7 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl,
out_free_async_qe:
nvme_rdma_free_qe(ctrl->device->dev, &ctrl->async_event_sqe,
sizeof(struct nvme_command), DMA_TO_DEVICE);
ctrl->async_event_sqe.data = NULL;
out_free_queue:
nvme_rdma_free_queue(&ctrl->queues[0]);
return error;