[PATCH] ata: pata_pxa: Fix DMA channel leak on probe error

[Wentao Liang]

When dmaengine_slave_config() fails, the DMA channel acquired by
dma_request_chan() is not released before returning the error,
leaking the channel reference.

Fix by adding dma_release_channel() in the error path.

The ata_host_activate() error path already correctly releases the
DMA channel.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 88622d80af82 ("ata: pata_pxa: dmaengine conversion")
Signed-off-by: Wentao Liang <vulab@xxxxxxxxxxx>
---
 drivers/ata/pata_pxa.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/ata/pata_pxa.c b/drivers/ata/pata_pxa.c
index 03dbaf4a13a7..9f63bdfb8576 100644
--- a/drivers/ata/pata_pxa.c
+++ b/drivers/ata/pata_pxa.c
@@ -286,6 +286,7 @@ static int pxa_ata_probe(struct platform_device *pdev)
 	ret = dmaengine_slave_config(data->dma_chan, &config);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "dma configuration failed: %d\n", ret);
+		dma_release_channel(data->dma_chan);
 		return ret;
 	}
 
-- 
2.39.5 (Apple Git-154)