linux-kernel - [PATCH] spi: add missing pci_dev

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Date:   Mon, 14 Feb 2022 18:00:07 -0800
From:   Qing Wang <wangqing@...o.com>
To:     Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Wang Qing <wangqing@...o.com>
Subject: [PATCH] spi: add missing pci_dev_put() before return

From: Wang Qing <wangqing@...o.com>

pci_get_slot() increases its reference count, the caller must
decrement the reference count by calling pci_dev_put()

Signed-off-by: Wang Qing <wangqing@...o.com>
---
 drivers/spi/spi-topcliff-pch.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c
index 8c4615b..8e1cc34
--- a/drivers/spi/spi-topcliff-pch.c
+++ b/drivers/spi/spi-topcliff-pch.c
@@ -877,7 +877,7 @@ static void pch_spi_request_dma(struct pch_spi_data *data, int bpw)
 		dev_err(&data->master->dev,
 			"ERROR: dma_request_channel FAILS(Tx)\n");
 		data->use_dma = 0;
-		return;
+		goto out;
 	}
 	dma->chan_tx = chan;
 
@@ -894,9 +894,12 @@ static void pch_spi_request_dma(struct pch_spi_data *data, int bpw)
 		dma_release_channel(dma->chan_tx);
 		dma->chan_tx = NULL;
 		data->use_dma = 0;
-		return;
+		goto out;
 	}
 	dma->chan_rx = chan;
+
+out:
+	pci_dev_put(dma_dev);
 }
 
 static void pch_spi_release_dma(struct pch_spi_data *data)
-- 
2.7.4