linux-kernel - [PATCH V7 2/4] rpmsg: Guard against null endpoint ops in destroy

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Date:   Wed, 24 Jun 2020 22:15:19 +0530
From:   Deepak Kumar Singh <deesin@...eaurora.org>
To:     bjorn.andersson@...aro.org, clew@...eaurora.org,
        mathieu.poirier@...aro.org
Cc:     Deepak Kumar Singh <deesin@...eaurora.org>,
        Arun Kumar Neelakantam <aneela@...eaurora.org>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        linux-remoteproc@...r.kernel.org (open list:REMOTE PROCESSOR MESSAGING
        (RPMSG) SUBSYSTEM), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH V7 2/4] rpmsg: Guard against null endpoint ops in destroy

From: Chris Lew <clew@...eaurora.org>

In RPMSG GLINK the chrdev device will allocate an ept as part of the
rpdev creation. This device will not register endpoint ops even though
it has an allocated ept. Protect against the case where the device is
being destroyed.

Signed-off-by: Chris Lew <clew@...eaurora.org>
Signed-off-by: Deepak Kumar Singh <deesin@...eaurora.org>
Signed-off-by: Arun Kumar Neelakantam <aneela@...eaurora.org>
---
 drivers/rpmsg/rpmsg_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index a6361ca..91de940 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -81,7 +81,7 @@ EXPORT_SYMBOL(rpmsg_create_ept);
  */
 void rpmsg_destroy_ept(struct rpmsg_endpoint *ept)
 {
-	if (ept)
+	if (ept && ept->ops)
 		ept->ops->destroy_ept(ept);
 }
 EXPORT_SYMBOL(rpmsg_destroy_ept);
-- 
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