of_find_device_by_node() takes reference, we should use put_device()
to release it when not need anymore.
Add missing put_device() to avoid refcount leak.
Fixes: 43f01da0f279 ("MIPS/OCTEON/ata: Convert pata_octeon_cf.c to use device tree.")
Signed-off-by: Miaoqian Lin <linmq006@xxxxxxxxx>
---
changes in v2:
- Add put_device() at the end of if (dma_dev).
we need the null check and do handling only if dma_dev!=NULL.
- call put_device before of_node_put() in error path. keep the
reverse order of resource allocation.
v1 link:
https://lore.kernel.org/all/20220511062723.56652-1-linmq006@xxxxxxxxx/
---
drivers/ata/pata_octeon_cf.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/ata/pata_octeon_cf.c b/drivers/ata/pata_octeon_cf.c
index 6b5ed3046b44..35608a0cf552 100644
--- a/drivers/ata/pata_octeon_cf.c
+++ b/drivers/ata/pata_octeon_cf.c
@@ -856,12 +856,14 @@ static int octeon_cf_probe(struct platform_device *pdev)
int i;
res_dma = platform_get_resource(dma_dev, IORESOURCE_MEM, 0);
if (!res_dma) {
+ put_device(&dma_dev->dev);
of_node_put(dma_node);
return -EINVAL;
}
cf_port->dma_base = (u64)devm_ioremap(&pdev->dev, res_dma->start,
resource_size(res_dma));
if (!cf_port->dma_base) {
+ put_device(&dma_dev->dev);
of_node_put(dma_node);
return -EINVAL;
}
@@ -871,6 +873,7 @@ static int octeon_cf_probe(struct platform_device *pdev)
irq = i;
irq_handler = octeon_cf_interrupt;
}
+ put_device(&dma_dev->dev);
}
of_node_put(dma_node);
}
--
2.25.1
