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spi: dw-dma: decrease reference count in dw_spi_dma_init_mfld()

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pci_get_device() will increase the reference count for the returned
pci_dev. Since 'dma_dev' is only used to filter the channel in
dw_spi_dma_chan_filer() after using it we need to call pci_dev_put() to
decrease the reference count. Also add pci_dev_put() for the error case.

Fixes: 7063c0d942 ("spi/dw_spi: add DMA support")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Acked-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20221116093204.46700-1-wangxiongfeng2@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Xiongfeng Wang 2022-11-16 17:32:04 +08:00 committed by Mark Brown
parent db2d2dc9a0
commit 804313b64e
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1 changed files with 3 additions and 0 deletions
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3
drivers/spi/spi-dw-dma.c
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@ -128,12 +128,15 @@ static int dw_spi_dma_init_mfld(struct device *dev, struct dw_spi *dws)
dw_spi_dma_sg_burst_init(dws);
pci_dev_put(dma_dev);
return 0;
free_rxchan:
dma_release_channel(dws->rxchan);
dws->rxchan = NULL;
err_exit:
pci_dev_put(dma_dev);
return -EBUSY;
}