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serial: 8250_aspeed_vuart: Fix potential NULL dereference in aspeed_vuart_probe
platform_get_resource() may fail and return NULL, so we should
better check it's return value to avoid a NULL pointer dereference.
Fixes: 54da3e381c
("serial: 8250_aspeed_vuart: use UPF_IOREMAP to set up register mapping")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220404143842.16960-1-linmq006@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -429,6 +429,8 @@ static int aspeed_vuart_probe(struct platform_device *pdev)
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timer_setup(&vuart->unthrottle_timer, aspeed_vuart_unthrottle_exp, 0);
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -EINVAL;
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memset(&port, 0, sizeof(port));
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port.port.private_data = vuart;
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