PCI: conditional resource-reallocation through kernel parameter pci=realloc

    
Multiple attempts to dynamically reallocate pci resources have
unfortunately lead to regressions. Though we continue to fix the
regressions and fine tune the dynamic-reallocation behavior, we have not
reached a acceptable state yet.
    
This patch provides a interim solution. It disables dynamic reallocation
by default, but adds the ability to enable it through pci=realloc kernel
command line parameter.
    
Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 2c5b9b991279..692671b11667 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -3483,6 +3483,8 @@ static int __init pci_setup(char *str)
                                 pci_no_msi();
                         } else if (!strcmp(str, "noaer")) {
                                 pci_no_aer();
+                        } else if (!strncmp(str, "realloc", 7)) {
+                                pci_realloc();
                         } else if (!strcmp(str, "nodomains")) {
                                 pci_no_domains();
                         } else if (!strncmp(str, "cbiosize=", 9)) {