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[5.4,007/314] remoteproc: Fix IDR initialisation in rproc_alloc()

Message ID 20200623195339.144198310@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman June 23, 2020, 7:53 p.m. UTC 
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(-)

-- 
2.25.1
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Patch

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);