1 files changed, 18 insertions, 2 deletions

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 37c00f6fd801..728b3c863d87 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -17,11 +17,16 @@
 #include <linux/module.h>
 #include <linux/spinlock.h>
 #include <linux/string.h>
+#include <linux/log2.h>
 #include <asm/dma.h>    /* isa_dma_bridge_buggy */
 #include "pci.h"
 
 unsigned int pci_pm_d3_delay = 10;
 
+#ifdef CONFIG_PCI_DOMAINS
+int pci_domains_supported = 1;
+#endif
+
 #define DEFAULT_CARDBUS_IO_SIZE         (256)
 #define DEFAULT_CARDBUS_MEM_SIZE        (64*1024*1024)
 /* pci=cbmemsize=nnM,cbiosize=nn can override this */
@@ -1454,7 +1459,7 @@ int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc)
         int cap, err = -EINVAL;
         u32 stat, cmd, v, o;
 
-        if (mmrbc < 512 || mmrbc > 4096 || (mmrbc & (mmrbc-1)))
+        if (mmrbc < 512 || mmrbc > 4096 || !is_power_of_2(mmrbc))
                 goto out;
 
         v = ffs(mmrbc) - 10;
@@ -1526,7 +1531,7 @@ int pcie_set_readrq(struct pci_dev *dev, int rq)
         int cap, err = -EINVAL;
         u16 ctl, v;
 
-        if (rq < 128 || rq > 4096 || (rq & (rq-1)))
+        if (rq < 128 || rq > 4096 || !is_power_of_2(rq))
                 goto out;
 
         v = (ffs(rq) - 8) << 12;
@@ -1566,6 +1571,13 @@ int pci_select_bars(struct pci_dev *dev, unsigned long flags)
         return bars;
 }
 
+static void __devinit pci_no_domains(void)
+{
+#ifdef CONFIG_PCI_DOMAINS
+        pci_domains_supported = 0;
+#endif
+}
+
 static int __devinit pci_init(void)
 {
         struct pci_dev *dev = NULL;
@@ -1585,6 +1597,10 @@ static int __devinit pci_setup(char *str)
                 if (*str && (str = pcibios_setup(str)) && *str) {
                         if (!strcmp(str, "nomsi")) {
                                 pci_no_msi();
+                        } else if (!strcmp(str, "noaer")) {
+                                pci_no_aer();
+                        } else if (!strcmp(str, "nodomains")) {
+                                pci_no_domains();
                         } else if (!strncmp(str, "cbiosize=", 9)) {
                                 pci_cardbus_io_size = memparse(str + 9, &str);
                         } else if (!strncmp(str, "cbmemsize=", 10)) {