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Diffstat (limited to 'arch/tile/kernel/pci.c')
-rw-r--r--arch/tile/kernel/pci.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 67237d34c2e2..b7180e6e900d 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -20,7 +20,6 @@
#include <linux/capability.h>
#include <linux/sched.h>
#include <linux/errno.h>
-#include <linux/bootmem.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/uaccess.h>
@@ -52,6 +51,8 @@
*
*/
+static int pci_probe = 1;
+
/*
* This flag tells if the platform is TILEmpower that needs
* special configuration for the PLX switch chip.
@@ -144,6 +145,11 @@ int __init tile_pci_init(void)
{
int i;
+ if (!pci_probe) {
+ pr_info("PCI: disabled by boot argument\n");
+ return 0;
+ }
+
pr_info("PCI: Searching for controllers...\n");
/* Re-init number of PCIe controllers to support hot-plug feature. */
@@ -192,7 +198,6 @@ int __init tile_pci_init(void)
controller->hv_cfg_fd[0] = hv_cfg_fd0;
controller->hv_cfg_fd[1] = hv_cfg_fd1;
controller->hv_mem_fd = hv_mem_fd;
- controller->first_busno = 0;
controller->last_busno = 0xff;
controller->ops = &tile_cfg_ops;
@@ -283,7 +288,7 @@ int __init pcibios_init(void)
* known to require at least 20ms here, but we use a more
* conservative value.
*/
- mdelay(250);
+ msleep(250);
/* Scan all of the recorded PCI controllers. */
for (i = 0; i < TILE_NUM_PCIE; i++) {
@@ -304,18 +309,10 @@ int __init pcibios_init(void)
pr_info("PCI: initializing controller #%d\n", i);
- /*
- * This comes from the generic Linux PCI driver.
- *
- * It reads the PCI tree for this bus into the Linux
- * data structures.
- *
- * This is inlined in linux/pci.h and calls into
- * pci_scan_bus_parented() in probe.c.
- */
pci_add_resource(&resources, &ioport_resource);
pci_add_resource(&resources, &iomem_resource);
- bus = pci_scan_root_bus(NULL, 0, controller->ops, controller, &resources);
+ bus = pci_scan_root_bus(NULL, 0, controller->ops,
+ controller, &resources);
controller->root_bus = bus;
controller->last_busno = bus->busn_res.end;
}
@@ -388,6 +385,16 @@ void pcibios_set_master(struct pci_dev *dev)
/* No special bus mastering setup handling. */
}
+/* Process any "pci=" kernel boot arguments. */
+char *__init pcibios_setup(char *str)
+{
+ if (!strcmp(str, "off")) {
+ pci_probe = 0;
+ return NULL;
+ }
+ return str;
+}
+
/*
* Enable memory and/or address decoding, as appropriate, for the
* device described by the 'dev' struct.