[PATCH 5.4 245/320] rpmsg: core: Clean up resources on announce_create failure.

Greg Kroah-Hartman
2022-01-24T19:51:19Z

From: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>

commit 8066c615cb69b7da8a94f59379847b037b3a5e46 upstream.

During the rpmsg_dev_probe, if rpdev->ops->announce_create returns an
error, the rpmsg device and default endpoint should be freed before
exiting the function.

Fixes: 5e619b48677c ("rpmsg: Split rpmsg core and virtio backend")
Suggested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20211206190758.10004-1-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/rpmsg/rpmsg_core.c | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)

--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -473,13 +473,25 @@ static int rpmsg_dev_probe(struct device
err = rpdrv->probe(rpdev);
if (err) {
dev_err(dev, "%s: failed: %d\n", __func__, err);
- if (ept)
- rpmsg_destroy_ept(ept);
- goto out;
+ goto destroy_ept;
}

- if (ept && rpdev->ops->announce_create)
+ if (ept && rpdev->ops->announce_create) {
err = rpdev->ops->announce_create(rpdev);
+ if (err) {
+ dev_err(dev, "failed to announce creation\n");
+ goto remove_rpdev;
+ }
+ }
+
+ return 0;
+
+remove_rpdev:
+ if (rpdrv->remove)
+ rpdrv->remove(rpdev);
+destroy_ept:
+ if (ept)
+ rpmsg_destroy_ept(ept);
out:
return err;
}