diff options
| author | Nishka Dasgupta <nishkadg.linux@gmail.com> | 2019-07-24 13:46:09 +0530 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2019-08-08 17:56:50 +0530 |
| commit | 057b05d5ac4745e7999656223bc6426c0129ba86 (patch) | |
| tree | 479bebab94ff24da9f6d4f101d3f14493ce4ebf5 /drivers | |
| parent | 232a7f18cf8ecbd92a8cc6ca7feee4f6aab668fe (diff) | |
| download | linux-057b05d5ac4745e7999656223bc6426c0129ba86.tar.bz2 | |
dmaengine: qcom: hidma_mgmt: Add of_node_put() before goto
Each iteration of for_each_available_child_of_node puts the previous
node, but in the case of a goto from the middle of the loop, there is
no put, thus causing a memory leak.
Hence add an of_node_put under the label that the gotos point to.
In order to avoid decrementing an already-decremented refcount, copy the
original contents of the label (including the return statement) to just
above the label, so that the code under the label is executed only when
a goto exit from the loop occurs.
Additionally, remove an unnecessary get/put pair from the loop, as the
loop itself already keeps track of refcount.
Issue found with Coccinelle.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Acked-by: Sinan Kaya <okaya@kernel.org>
Link: https://lore.kernel.org/r/20190724081609.9724-1-nishkadg.linux@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/qcom/hidma_mgmt.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/dma/qcom/hidma_mgmt.c b/drivers/dma/qcom/hidma_mgmt.c index 7cb81a50f3f3..806ca02c52d7 100644 --- a/drivers/dma/qcom/hidma_mgmt.c +++ b/drivers/dma/qcom/hidma_mgmt.c @@ -387,7 +387,6 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np) ret = PTR_ERR(new_pdev); goto out; } - of_node_get(child); new_pdev->dev.of_node = child; of_dma_configure(&new_pdev->dev, child, true); /* @@ -395,9 +394,14 @@ static int __init hidma_mgmt_of_populate_channels(struct device_node *np) * platforms with or without MSI support. */ of_msi_configure(&new_pdev->dev, child); - of_node_put(child); } + + kfree(res); + + return ret; + out: + of_node_put(child); kfree(res); return ret; |