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Date:   Fri,  1 May 2020 15:22:40 +0200
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,, Clement Leger <>,
        Bjorn Andersson <>,
        Doug Anderson <>
Subject: [PATCH 5.4 01/83] remoteproc: Fix wrong rvring index computation

From: Clement Leger <>

commit 00a0eec59ddbb1ce966b19097d8a8d2f777e726a upstream.

Index of rvring is computed using pointer arithmetic. However, since
rvring->rvdev->vring is the base of the vring array, computation
of rvring idx should be reversed. It previously lead to writing at negative
indices in the resource table.

Signed-off-by: Clement Leger <>
Signed-off-by: Bjorn Andersson <>
Cc: Doug Anderson <>
Signed-off-by: Greg Kroah-Hartman <>

 drivers/remoteproc/remoteproc_core.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -400,7 +400,7 @@ rproc_parse_vring(struct rproc_vdev *rvd
 void rproc_free_vring(struct rproc_vring *rvring)
 	struct rproc *rproc = rvring->rvdev->rproc;
-	int idx = rvring->rvdev->vring - rvring;
+	int idx = rvring - rvring->rvdev->vring;
 	struct fw_rsc_vdev *rsc;
 	idr_remove(&rproc->notifyids, rvring->notifyid);

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