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Date: Wed, 16 Dec 2020 13:26:52 +0100 From: Vasyl Gomonovych <gomonovych@...il.com> To: ssantosh@...nel.org Cc: Vasyl Gomonovych <gomonovych@...il.com>, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org Subject: [PATCH] soc: ti: knav_qmss: Put refcount for dev node in failure case for_each_child_of_node increases refcount for each device_node and decreases previous one in a loop, but in case jump out of a loop current node refcount has no chnase for decreases so requires an of_node_put for jupm out cases. Fix based on raport from scripts/coccinelle/iterators/for_each_child.cocci Signed-off-by: Vasyl Gomonovych <gomonovych@...il.com> --- drivers/soc/ti/knav_dma.c | 1 + drivers/soc/ti/knav_qmss_queue.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/drivers/soc/ti/knav_dma.c b/drivers/soc/ti/knav_dma.c index 8c863ecb1c60..9d25546e4d96 100644 --- a/drivers/soc/ti/knav_dma.c +++ b/drivers/soc/ti/knav_dma.c @@ -757,6 +757,7 @@ static int knav_dma_probe(struct platform_device *pdev) for_each_child_of_node(node, child) { ret = dma_init(node, child); if (ret) { + of_node_put(child); dev_err(&pdev->dev, "init failed with %d\n", ret); break; } diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c index a460f201bf8e..f9fc639abad2 100644 --- a/drivers/soc/ti/knav_qmss_queue.c +++ b/drivers/soc/ti/knav_qmss_queue.c @@ -1086,6 +1086,7 @@ static int knav_queue_setup_regions(struct knav_device *kdev, for_each_child_of_node(regions, child) { region = devm_kzalloc(dev, sizeof(*region), GFP_KERNEL); if (!region) { + of_node_put(child); dev_err(dev, "out of memory allocating region\n"); return -ENOMEM; } @@ -1399,6 +1400,7 @@ static int knav_queue_init_qmgrs(struct knav_device *kdev, for_each_child_of_node(qmgrs, child) { qmgr = devm_kzalloc(dev, sizeof(*qmgr), GFP_KERNEL); if (!qmgr) { + of_node_put(child); dev_err(dev, "out of memory allocating qmgr\n"); return -ENOMEM; } @@ -1498,6 +1500,7 @@ static int knav_queue_init_pdsps(struct knav_device *kdev, for_each_child_of_node(pdsps, child) { pdsp = devm_kzalloc(dev, sizeof(*pdsp), GFP_KERNEL); if (!pdsp) { + of_node_put(child); dev_err(dev, "out of memory allocating pdsp\n"); return -ENOMEM; } -- 2.17.1
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