From 00a0eec59ddbb1ce966b19097d8a8d2f777e726a Mon Sep 17 00:00:00 2001
From: Clement Leger <cleger@kalray.eu>
Date: Fri, 4 Oct 2019 09:37:36 +0200
Subject: [PATCH] remoteproc: Fix wrong rvring index computation
Git-commit: 00a0eec59ddbb1ce966b19097d8a8d2f777e726a
Patch-mainline: v5.5-rc1
References: git-fixes
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 <cleger@kalray.eu>
Link: https://lore.kernel.org/r/20191004073736.8327-1-cleger@kalray.eu
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
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
@@ -288,7 +288,7 @@ void rproc_free_vring(struct rproc_vring
{
int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
struct rproc *rproc = rvring->rvdev->rproc;
- int idx = rvring->rvdev->vring - rvring;
+ int idx = rvring - rvring->rvdev->vring;
struct fw_rsc_vdev *rsc;
dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma);