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iommu/msm: Use platform_register/unregister_drivers() 

These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Thierry Reding 2015-12-02 17:26:01 +01:00 committed by Joerg Roedel
parent 9f9499ae8e
commit e7479a1907
1 changed files with 7 additions and 18 deletions
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25
drivers/iommu/msm_iommu_dev.c
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@ -359,30 +359,19 @@ static struct platform_driver msm_iommu_ctx_driver = {
.remove = msm_iommu_ctx_remove,
};
static struct platform_driver * const drivers[] = {
&msm_iommu_driver,
&msm_iommu_ctx_driver,
};
static int __init msm_iommu_driver_init(void)
{
int ret;
ret = platform_driver_register(&msm_iommu_driver);
if (ret != 0) {
pr_err("Failed to register IOMMU driver\n");
goto error;
}
ret = platform_driver_register(&msm_iommu_ctx_driver);
if (ret != 0) {
platform_driver_unregister(&msm_iommu_driver);
pr_err("Failed to register IOMMU context driver\n");
goto error;
}
error:
return ret;
return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
}
static void __exit msm_iommu_driver_exit(void)
{
platform_driver_unregister(&msm_iommu_ctx_driver);
platform_driver_unregister(&msm_iommu_driver);
platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
subsys_initcall(msm_iommu_driver_init);