Merge branch 'pci/resource' into next

[linux-beck.git] / drivers / pci / probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3f1d0095235588f3a5b84bcf95f920276e40cb67..8004f67c57ec6ae59157714e507f06429127765e 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -15,6 +15,7 @@
 #include <linux/pci-aspm.h>
 #include <linux/aer.h>
 #include <linux/acpi.h>
+#include <linux/irqdomain.h>
 #include "pci.h"
 
 #define CARDBUS_LATENCY_TIMER  176     /* secondary latency timer */
@@ -178,6 +179,9 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
        u16 orig_cmd;
        struct pci_bus_region region, inverted_region;
 
+       if (dev->non_compliant_bars)
+               return 0;
+
        mask = type ? PCI_ROM_ADDRESS_MASK : ~0;
 
        /* No printks while decoding is disabled! */
@@ -674,6 +678,20 @@ static struct irq_domain *pci_host_bridge_msi_domain(struct pci_bus *bus)
        if (!d)
                d = pci_host_bridge_acpi_msi_domain(bus);
 
+#ifdef CONFIG_PCI_MSI_IRQ_DOMAIN
+       /*
+        * If no IRQ domain was found via the OF tree, try looking it up
+        * directly through the fwnode_handle.
+        */
+       if (!d) {
+               struct fwnode_handle *fwnode = pci_root_bus_fwnode(bus);
+
+               if (fwnode)
+                       d = irq_find_matching_fwnode(fwnode,
+                                                    DOMAIN_BUS_PCI_MSI);
+       }
+#endif
+
        return d;
 }
 
@@ -757,6 +775,12 @@ add_dev:
 
        pcibios_add_bus(child);
 
+       if (child->ops->add_bus) {
+               ret = child->ops->add_bus(child);
+               if (WARN_ON(ret < 0))
+                       dev_err(&child->dev, "failed to add bus: %d\n", ret);
+       }
+
        /* Create legacy_io and legacy_mem files for this bus */
        pci_create_legacy_files(child);
 
@@ -1170,6 +1194,7 @@ static void pci_msi_setup_pci_dev(struct pci_dev *dev)
 int pci_setup_device(struct pci_dev *dev)
 {
        u32 class;
+       u16 cmd;
        u8 hdr_type;
        int pos = 0;
        struct pci_bus_region region;
@@ -1213,6 +1238,16 @@ int pci_setup_device(struct pci_dev *dev)
        /* device class may be changed after fixup */
        class = dev->class >> 8;
 
+       if (dev->non_compliant_bars) {
+               pci_read_config_word(dev, PCI_COMMAND, &cmd);
+               if (cmd & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY)) {
+                       dev_info(&dev->dev, "device has non-compliant BARs; disabling IO/MEM decoding\n");
+                       cmd &= ~PCI_COMMAND_IO;
+                       cmd &= ~PCI_COMMAND_MEMORY;
+                       pci_write_config_word(dev, PCI_COMMAND, cmd);
+               }
+       }
+
        switch (dev->hdr_type) {                    /* header type */
        case PCI_HEADER_TYPE_NORMAL:                /* standard header */
                if (class == PCI_CLASS_BRIDGE_PCI)