clk: sunxi: sun9i-mmc: check return value after calling platform_get_resource()

stable inclusion
from stable-v5.10.114
commit ee71b47da599d7d0715ece34dca9e4f7822cf87f
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5IY1V

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ee71b47da599d7d0715ece34dca9e4f7822cf87f

--------------------------------

[ Upstream commit f58ca215 ]

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

Fixes: 7a6fca87 ("clk: sunxi: Add driver for A80 MMC config clocks/resets")
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Reviewed-by: NSamuel Holland <samuel@sholland.org>
Signed-off-by: NJernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220421134308.2885094-1-yangyingliang@huawei.comSigned-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/clk/sunxi/clk-sun9i-mmc.c

@@ -109,6 +109,8 @@ static int sun9i_a80_mmc_config_clk_probe(struct platform_device *pdev)
 	spin_lock_init(&data->lock);
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!r)
+		return -EINVAL;
 	/* one clock/reset pair per word */
 	count = DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH);
 	data->membase = devm_ioremap_resource(&pdev->dev, r);