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

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[ Upstream commit f58ca215cda1975f77b2b762903684a3c101bec9 ]

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

Fixes: 7a6fca879f ("clk: sunxi: Add driver for A80 MMC config clocks/resets")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220421134308.2885094-1-yangyingliang@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yang Yingliang
2022-04-21 21:43:08 +08:00
committed by Greg Kroah-Hartman
parent 8dacbef4fe
commit ee71b47da5
1 changed files with 2 additions and 0 deletions
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2
drivers/clk/sunxi/clk-sun9i-mmc.c
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@@ -109,6 +109,8 @@ static int sun9i_a80_mmc_config_clk_probe(struct platform_device *pdev)
spin_lock_init(&data->lock); spin_lock_init(&data->lock);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0); r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r)
return -EINVAL;
/* one clock/reset pair per word */ /* one clock/reset pair per word */
count = DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH); count = DIV_ROUND_UP((resource_size(r)), SUN9I_MMC_WIDTH);
data->membase = devm_ioremap_resource(&pdev->dev, r); data->membase = devm_ioremap_resource(&pdev->dev, r);