From: Fei Shao fshao@chromium.org
[ Upstream commit 5c154b6a51c2d2d7f266b3ef49b7dd1dc8cb5b65 ]
of_alias_get_id() may return -ENODEV which leads to illegal access to the cmdq->clocks array. Adding a check over alias_id to prevent the unexpected behavior.
Fixes: 85dfdbfc13ea ("mailbox: cmdq: add multi-gce clocks support for mt8195") Signed-off-by: Fei Shao fshao@chromium.org Reviewed-by: Tzung-Bi Shih tzungbi@google.com Signed-off-by: Jassi Brar jaswinder.singh@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/mailbox/mtk-cmdq-mailbox.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c index c591dab9d5a48..9b0cc3bb5b23a 100644 --- a/drivers/mailbox/mtk-cmdq-mailbox.c +++ b/drivers/mailbox/mtk-cmdq-mailbox.c @@ -572,7 +572,7 @@ static int cmdq_probe(struct platform_device *pdev) char clk_id[8];
alias_id = of_alias_get_id(node, clk_name); - if (alias_id < cmdq->gce_num) { + if (alias_id >= 0 && alias_id < cmdq->gce_num) { snprintf(clk_id, sizeof(clk_id), "%s%d", clk_name, alias_id); cmdq->clocks[alias_id].id = clk_id; cmdq->clocks[alias_id].clk = of_clk_get(node, 0);