serial: pic32: Add checks for devm_clk_get() in pic32_uart_probe()
As the devm_clk_get() may return ERR_PTR, its return value needs to be
checked to avoid invalid poineter dereference.
Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20221125093832.33386-1-yuancan@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/pic32_uart.c b/drivers/tty/serial/pic32_uart.c
index ba34352..196a4e6 100644
--- a/drivers/tty/serial/pic32_uart.c
+++ b/drivers/tty/serial/pic32_uart.c
@@ -889,6 +889,8 @@ static int pic32_uart_probe(struct platform_device *pdev)
sport->irq_rx = irq_of_parse_and_map(np, 1);
sport->irq_tx = irq_of_parse_and_map(np, 2);
sport->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(sport->clk))
+ return PTR_ERR(sport->clk);
sport->dev = &pdev->dev;
/* Hardware flow control: gpios
