Unverified Commit 804313b6 authored by Xiongfeng Wang's avatar Xiongfeng Wang Committed by Mark Brown
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spi: dw-dma: decrease reference count in dw_spi_dma_init_mfld() 



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: 7063c0d9 ("spi/dw_spi: add DMA support")
Signed-off-by: default avatarXiongfeng Wang <wangxiongfeng2@huawei.com>
Acked-by: default avatarSerge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20221116093204.46700-1-wangxiongfeng2@huawei.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent db2d2dc9

drivers/spi/spi-dw-dma.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

}