| Message ID | 1481728260-21771-1-git-send-email-loic.pallardy@st.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
On 12/14/2016 04:11 PM, Loic Pallardy wrote: > 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. > > Signed-off-by: Loic Pallardy <loic.pallardy@st.com> > --- > 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, > Hi Loic Acked-by: Patrice Chotard <patrice.chotard@st.com> Patrice -- To unsubscribe from this list: send the line "unsubscribe linux-remoteproc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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,
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. Signed-off-by: Loic Pallardy <loic.pallardy@st.com> --- drivers/remoteproc/remoteproc_core.c | 3 --- 1 file changed, 3 deletions(-)