From c81c0e0710f031cb09eb7cbf0e75e6754d1d8346 Mon Sep 17 00:00:00 2001 From: Loic Pallardy Date: Wed, 14 Dec 2016 16:11:00 +0100 Subject: [PATCH] remoteproc: fix vdev reference management Commit 2b45cef5868a ("remoteproc: Further extend the vdev life cycle") extends kref support for vdev management. It introduces a regression when following sequence is executed: rproc_boot --> rproc_shutdown --> rproc_boot Second rproc_boot call crashes on register_virtio_device as device is already existing. Issue is previous vdev is never released when rproc is stop because associated refcount is too high. kref_get introduces is not needed as kref_init already initializes krefcount to 1 because it considers associated variable as used. This introduces a misalignment between kref_get and kref_put calls. Fixes: 2b45cef5868a ("remoteproc: Further extend the vdev life cycle") Signed-off-by: Loic Pallardy Signed-off-by: Bjorn Andersson --- drivers/remoteproc/remoteproc_core.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 9a507e7..feb24c4 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -396,9 +396,6 @@ static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc, goto unwind_vring_allocations; } - /* track the rvdevs list reference */ - kref_get(&rvdev->refcount); - list_add_tail(&rvdev->node, &rproc->rvdevs); rproc_add_subdev(rproc, &rvdev->subdev, -- 2.7.4