diff options
| author | Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> | 2022-06-15 12:10:37 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-07-06 12:51:10 +0200 |
| commit | 8778b1d48117055c710a01498f65fa730160fdfa (patch) | |
| tree | cf373903a0d974bf202f750711c40dc852ca65bc /drivers/acpi/arm64 | |
| parent | iommu: Introduce a callback to struct iommu_resv_region (diff) | |
| download | linux-8778b1d48117055c710a01498f65fa730160fdfa.tar.xz linux-8778b1d48117055c710a01498f65fa730160fdfa.zip | |
ACPI/IORT: Make iort_iommu_msi_get_resv_regions() return void
At present iort_iommu_msi_get_resv_regions() returns the number of
MSI reserved regions on success and there are no users for this.
The reserved region list will get populated anyway for platforms
that require the HW MSI region reservation. Hence, change the
function to return void instead.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Steven Price <steven.price@arm.com>
Tested-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220615101044.1972-3-shameerali.kolothum.thodi@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/acpi/arm64')
| -rw-r--r-- | drivers/acpi/arm64/iort.c | 25 |
1 files changed, 9 insertions, 16 deletions
diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c index f2f8f05662de..213f61cae176 100644 --- a/drivers/acpi/arm64/iort.c +++ b/drivers/acpi/arm64/iort.c @@ -811,22 +811,19 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev) * @dev: Device from iommu_get_resv_regions() * @head: Reserved region list from iommu_get_resv_regions() * - * Returns: Number of msi reserved regions on success (0 if platform - * doesn't require the reservation or no associated msi regions), - * appropriate error value otherwise. The ITS interrupt translation - * spaces (ITS_base + SZ_64K, SZ_64K) associated with the device - * are the msi reserved regions. + * The ITS interrupt translation spaces (ITS_base + SZ_64K, SZ_64K) + * associated with the device are the HW MSI reserved regions. */ -int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) +void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) { struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct acpi_iort_its_group *its; struct acpi_iort_node *iommu_node, *its_node = NULL; - int i, resv = 0; + int i; iommu_node = iort_get_msi_resv_iommu(dev); if (!iommu_node) - return 0; + return; /* * Current logic to reserve ITS regions relies on HW topologies @@ -846,7 +843,7 @@ int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) } if (!its_node) - return 0; + return; /* Move to ITS specific data */ its = (struct acpi_iort_its_group *)its_node->node_data; @@ -860,14 +857,10 @@ int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) region = iommu_alloc_resv_region(base + SZ_64K, SZ_64K, prot, IOMMU_RESV_MSI); - if (region) { + if (region) list_add_tail(®ion->list, head); - resv++; - } } } - - return (resv == its->its_count) ? resv : -ENODEV; } static inline bool iort_iommu_driver_enabled(u8 type) @@ -1034,8 +1027,8 @@ int iort_iommu_configure_id(struct device *dev, const u32 *id_in) } #else -int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) -{ return 0; } +void iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head) +{ } int iort_iommu_configure_id(struct device *dev, const u32 *input_id) { return -ENODEV; } #endif |