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iommu/rockchip: Fix unwind goto issue

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[ Upstream commit ec014683c5 ]

Smatch complains that
drivers/iommu/rockchip-iommu.c:1306 rk_iommu_probe() warn: missing unwind goto?

The rk_iommu_probe function, after obtaining the irq value through
platform_get_irq, directly returns an error if the returned value
is negative, without releasing any resources.

Fix this by adding a new error handling label "err_pm_disable" and
use a goto statement to redirect to the error handling process. In
order to preserve the original semantics, set err to the value of irq.

Fixes: 1aa55ca9b1 ("iommu/rockchip: Move irq request past pm_runtime_enable")
Signed-off-by: Chao Wang <D202280639@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Link: https://lore.kernel.org/r/20230417030421.2777-1-D202280639@hust.edu.cn
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chao Wang 2023-04-17 03:04:21 +00:00 • committed by Greg Kroah-Hartman
commit bd9e61ee3e
1 changed files with 8 additions and 6 deletions
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14
drivers/iommu/rockchip-iommu.c
View file

@ -1218,18 +1218,20 @@ static int rk_iommu_probe(struct platform_device *pdev)
for (i = 0; i < iommu->num_irq; i++) {
int irq = platform_get_irq(pdev, i);
if (irq < 0)
return irq;
if (irq < 0) {
err = irq;
goto err_pm_disable;
}
err = devm_request_irq(iommu->dev, irq, rk_iommu_irq,
IRQF_SHARED, dev_name(dev), iommu);
if (err) {
pm_runtime_disable(dev);
goto err_remove_sysfs;
}
if (err)
goto err_pm_disable;
}
return 0;
err_pm_disable:
pm_runtime_disable(dev);
err_remove_sysfs:
iommu_device_sysfs_remove(&iommu->iommu);
err_put_group: