diff options
| author | Chao Wang <D202280639@hust.edu.cn> | 2023-04-17 06:04:21 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-09 11:33:59 +0300 |
| commit | bf1f3f4aa47dda5ee5c5047d4f2311d811fdafb0 (patch) | |
| tree | 98bd752db4160552247a0c6cdc65a6b653c74ad8 /drivers/iommu | |
| parent | 0021441cbbf08266b420e60b9eb76b3061cfa85d (diff) | |
| download | linux-bf1f3f4aa47dda5ee5c5047d4f2311d811fdafb0.tar.xz | |
iommu/rockchip: Fix unwind goto issue
[ Upstream commit ec014683c564fb74fc68e8f5e84691d3b3839d24 ]
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: 1aa55ca9b14a ("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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/rockchip-iommu.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index a68eadd64f38..f7e9b56be174 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -1303,20 +1303,22 @@ 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; } dma_set_mask_and_coherent(dev, rk_ops->dma_bit_mask); return 0; +err_pm_disable: + pm_runtime_disable(dev); err_remove_sysfs: iommu_device_sysfs_remove(&iommu->iommu); err_put_group: |