From: Alex Elder elder@linaro.org
[ Upstream commit 6442df49400b466431979e7634849a464a5f1861 ]
If ida_simple_get() returns an error when called in rproc_alloc(), put_device() is called to clean things up. By this time the rproc device type has been assigned, with rproc_type_release() as the release function.
The first thing rproc_type_release() does is call: idr_destroy(&rproc->notifyids);
But at the time the ida_simple_get() call is made, the notifyids field in the remoteproc structure has not been initialized.
I'm not actually sure this case causes an observable problem, but it's incorrect. Fix this by initializing the notifyids field before calling ida_simple_get() in rproc_alloc().
Fixes: b5ab5e24e960 ("remoteproc: maintain a generic child device for each rproc") Signed-off-by: Alex Elder elder@linaro.org Reviewed-by: Mathieu Poirier mathieu.poirier@linaro.org Reviewed-by: Suman Anna s-anna@ti.com Reviewed-by: Bjorn Andersson bjorn.andersson@linaro.org Link: https://lore.kernel.org/r/20200415204858.2448-2-mathieu.poirier@linaro.org Signed-off-by: Bjorn Andersson bjorn.andersson@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/remoteproc/remoteproc_core.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c index 0896b3614eb11..ce92ae227aa10 100644 --- a/drivers/remoteproc/remoteproc_core.c +++ b/drivers/remoteproc/remoteproc_core.c @@ -2036,6 +2036,7 @@ struct rproc *rproc_alloc(struct device *dev, const char *name, rproc->dev.type = &rproc_type; rproc->dev.class = &rproc_class; rproc->dev.driver_data = rproc; + idr_init(&rproc->notifyids);
/* Assign a unique device index and name */ rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL); @@ -2060,8 +2061,6 @@ struct rproc *rproc_alloc(struct device *dev, const char *name,
mutex_init(&rproc->lock);
- idr_init(&rproc->notifyids); - INIT_LIST_HEAD(&rproc->carveouts); INIT_LIST_HEAD(&rproc->mappings); INIT_LIST_HEAD(&rproc->traces);