interconnect: qcom: qcs404: Walk the list safely on node removal

As we will remove items off the list using list_del(), we need to use the
safe version of list_for_each_entry().

Fixes: 5e4e6c4d3ae0 ("interconnect: qcom: Add QCS404 interconnect provider driver")
Reported-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Cc: <stable@vger.kernel.org> # v5.4
Link: https://lore.kernel.org/r/20191212075332.16202-4-georgi.djakov@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/interconnect/qcom/qcs404.c b/drivers/interconnect/qcom/qcs404.c
index b4966d8..8e0735a 100644 (file)
--- a/drivers/interconnect/qcom/qcs404.c
+++ b/drivers/interconnect/qcom/qcs404.c
@@ -414,7 +414,7 @@ static int qnoc_probe(struct platform_device *pdev)
        struct icc_provider *provider;
        struct qcom_icc_node **qnodes;
        struct qcom_icc_provider *qp;
-       struct icc_node *node;
+       struct icc_node *node, *tmp;
        size_t num_nodes, i;
        int ret;
 
@@ -494,7 +494,7 @@ static int qnoc_probe(struct platform_device *pdev)
 
        return 0;
 err:
-       list_for_each_entry(node, &provider->nodes, node_list) {
+       list_for_each_entry_safe(node, tmp, &provider->nodes, node_list) {
                icc_node_del(node);
                icc_node_destroy(node->id);
        }
@@ -508,9 +508,9 @@ static int qnoc_remove(struct platform_device *pdev)
 {
        struct qcom_icc_provider *qp = platform_get_drvdata(pdev);
        struct icc_provider *provider = &qp->provider;
-       struct icc_node *n;
+       struct icc_node *n, *tmp;
 
-       list_for_each_entry(n, &provider->nodes, node_list) {
+       list_for_each_entry_safe(n, tmp, &provider->nodes, node_list) {
                icc_node_del(n);
                icc_node_destroy(n->id);
        }