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ASoC: fsl_xcvr: check return value after calling platform_get_resource_byname()

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It will cause null-ptr-deref if platform_get_resource_byname() returns NULL,
we need check the return value.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210615013922.784296-10-yangyingliang@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Yang Yingliang 2021-06-15 09:39:22 +08:00 committed by Mark Brown
parent 67798860e6
commit a2f6ed4a44
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1 changed files with 4 additions and 0 deletions
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sound/soc/fsl/fsl_xcvr.c
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@ -1202,6 +1202,10 @@ static int fsl_xcvr_probe(struct platform_device *pdev)
rx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rxfifo");
tx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "txfifo");
if (!rx_res || !tx_res) {
dev_err(dev, "could not find rxfifo or txfifo resource\n");
return -EINVAL;
}
xcvr->dma_prms_rx.chan_name = "rx";
xcvr->dma_prms_tx.chan_name = "tx";
xcvr->dma_prms_rx.addr = rx_res->start;