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Code Issues Releases Wiki Activity

ACPI/IORT: Stub out ACS functions when CONFIG_PCI is not set

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Remove PCI dependent code out of iort.c when CONFIG_PCI is not defined.
A quick search reveals the following functions:
1. pci_request_acs()
2. pci_domain_nr()
3. pci_is_root_bus()
4. to_pci_dev()

Both pci_domain_nr() and pci_is_root_bus() are defined in linux/pci.h.
pci_domain_nr() is a stub function when CONFIG_PCI is not set and
pci_is_root_bus() just returns a reference to a structure member which
is still valid without CONFIG_PCI set.

to_pci_dev() is a macro that expands to container_of.

pci_request_acs() is the only code that gets pulled in from drivers/pci/*.c

Signed-off-by: Sinan Kaya <okaya@kernel.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Sinan Kaya 2018-12-19 22:46:58 +00:00 committed by Rafael J. Wysocki
parent 52146173a0
commit 43554cebba
1 changed files with 13 additions and 7 deletions
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20
drivers/acpi/arm64/iort.c
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@ -1435,8 +1435,14 @@ static int __init iort_add_platform_device(struct acpi_iort_node *node,
return ret;
}
static bool __init iort_enable_acs(struct acpi_iort_node *iort_node)
#ifdef CONFIG_PCI
static void __init iort_enable_acs(struct acpi_iort_node *iort_node)
{
static bool acs_enabled __initdata;
if (acs_enabled)
return;
if (iort_node->type == ACPI_IORT_NODE_PCI_ROOT_COMPLEX) {
struct acpi_iort_node *parent;
struct acpi_iort_id_mapping *map;
@ -1458,13 +1464,15 @@ static bool __init iort_enable_acs(struct acpi_iort_node *iort_node)
if ((parent->type == ACPI_IORT_NODE_SMMU) ||
(parent->type == ACPI_IORT_NODE_SMMU_V3)) {
pci_request_acs();
return true;
acs_enabled = true;
return;
}
}
}
return false;
}
#else
static inline void iort_enable_acs(struct acpi_iort_node *iort_node) { }
#endif
static void __init iort_init_platform_devices(void)
{
@ -1472,7 +1480,6 @@ static void __init iort_init_platform_devices(void)
struct acpi_table_iort *iort;
struct fwnode_handle *fwnode;
int i, ret;
bool acs_enabled = false;
const struct iort_dev_config *ops;
/*
@ -1493,8 +1500,7 @@ static void __init iort_init_platform_devices(void)
return;
}
if (!acs_enabled)
acs_enabled = iort_enable_acs(iort_node);
iort_enable_acs(iort_node);
ops = iort_get_dev_cfg(iort_node);
if (ops) {