clk: imx: Add check for kcalloc

As the potential failure of the kcalloc(),
it should be better to check it in order to
avoid the dereference of the NULL pointer.

Fixes: 379c9a24cc23 ("clk: imx: Fix reparenting of UARTs not associated with stdout")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Link: https://lore.kernel.org/r/20220310080257.1988412-1-jiasheng@iscas.ac.cn
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>

diff --git a/drivers/clk/imx/clk.c b/drivers/clk/imx/clk.c
index 4bd6ad0..5582f18 100644 (file)
--- a/drivers/clk/imx/clk.c
+++ b/drivers/clk/imx/clk.c
@@ -176,6 +176,8 @@ void imx_register_uart_clocks(unsigned int clk_count)
                int i;
 
                imx_uart_clocks = kcalloc(clk_count, sizeof(struct clk *), GFP_KERNEL);
+               if (!imx_uart_clocks)
+                       return;
 
                if (!of_stdout)
                        return;