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path: root/drivers/dma/uniphier-mdmac.c
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Diffstat (limited to 'drivers/dma/uniphier-mdmac.c')
-rw-r--r--drivers/dma/uniphier-mdmac.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/dma/uniphier-mdmac.c b/drivers/dma/uniphier-mdmac.c
index 618839df07..ad7125f6e2 100644
--- a/drivers/dma/uniphier-mdmac.c
+++ b/drivers/dma/uniphier-mdmac.c
@@ -453,7 +453,7 @@ disable_clk:
return ret;
}
-static int uniphier_mdmac_remove(struct platform_device *pdev)
+static void uniphier_mdmac_remove(struct platform_device *pdev)
{
struct uniphier_mdmac_device *mdev = platform_get_drvdata(pdev);
struct dma_chan *chan;
@@ -468,16 +468,21 @@ static int uniphier_mdmac_remove(struct platform_device *pdev)
*/
list_for_each_entry(chan, &mdev->ddev.channels, device_node) {
ret = dmaengine_terminate_sync(chan);
- if (ret)
- return ret;
+ if (ret) {
+ /*
+ * This results in resource leakage and maybe also
+ * use-after-free errors as e.g. *mdev is kfreed.
+ */
+ dev_alert(&pdev->dev, "Failed to terminate channel %d (%pe)\n",
+ chan->chan_id, ERR_PTR(ret));
+ return;
+ }
uniphier_mdmac_free_chan_resources(chan);
}
of_dma_controller_free(pdev->dev.of_node);
dma_async_device_unregister(&mdev->ddev);
clk_disable_unprepare(mdev->clk);
-
- return 0;
}
static const struct of_device_id uniphier_mdmac_match[] = {
@@ -488,7 +493,7 @@ MODULE_DEVICE_TABLE(of, uniphier_mdmac_match);
static struct platform_driver uniphier_mdmac_driver = {
.probe = uniphier_mdmac_probe,
- .remove = uniphier_mdmac_remove,
+ .remove_new = uniphier_mdmac_remove,
.driver = {
.name = "uniphier-mio-dmac",
.of_match_table = uniphier_mdmac_match,