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Subject[PATCH 03/20] tile PCI RC: support pci=off boot arg for tilepro
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
---
arch/tile/kernel/pci.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)

diff --git a/arch/tile/kernel/pci.c b/arch/tile/kernel/pci.c
index 1dae3b2..af75835 100644
--- a/arch/tile/kernel/pci.c
+++ b/arch/tile/kernel/pci.c
@@ -51,6 +51,8 @@
*
*/

+static int pci_probe = 1;
+
/*
* This flag tells if the platform is TILEmpower that needs
* special configuration for the PLX switch chip.
@@ -143,6 +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. */
@@ -378,6 +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.
--
1.8.3.1


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