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authorFei Shao <fshao@chromium.org>2021-10-14 20:03:51 +0800
committerJassi Brar <jaswinder.singh@linaro.org>2021-10-19 12:28:09 -0500
commit5c154b6a51c2d2d7f266b3ef49b7dd1dc8cb5b65 (patch)
treeeda1b2de30039a055c2e69f663d4a62fb865e5bb /drivers/mailbox
parentce1537fe288469bf68ee0aabdb860a790b4755ef (diff)
mailbox: mtk-cmdq: Validate alias_id on probe
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>
Diffstat (limited to 'drivers/mailbox')
-rw-r--r--drivers/mailbox/mtk-cmdq-mailbox.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mailbox/mtk-cmdq-mailbox.c b/drivers/mailbox/mtk-cmdq-mailbox.c
index 4e9517efac29..2f6bb66341e4 100644
--- a/drivers/mailbox/mtk-cmdq-mailbox.c
+++ b/drivers/mailbox/mtk-cmdq-mailbox.c
@@ -570,7 +570,7 @@ 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);