x86: clear pci_mmcfg_virt when mmcfg get rejected

For x86_64, need to free pci_mmcfg_virt, and iounmap some pointers
when MMCONF is not reserved in E820 or acpi _CRS and get rejected.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg KH <greg@kroah.com>
Cc: Greg KH <greg@kroah.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index 498e35e..8f20495 100644 (file)
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -300,6 +300,7 @@ static void __init pci_mmcfg_reject_broken(void)
 
 reject:
        printk(KERN_ERR "PCI: Not using MMCONFIG.\n");
+       pci_mmcfg_arch_free();
        kfree(pci_mmcfg_config);
        pci_mmcfg_config = NULL;
        pci_mmcfg_config_num = 0;

diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c
index 081816a..f3c761d 100644 (file)
--- a/arch/x86/pci/mmconfig_32.c
+++ b/arch/x86/pci/mmconfig_32.c
@@ -136,3 +136,7 @@ int __init pci_mmcfg_arch_init(void)
        raw_pci_ext_ops = &pci_mmcfg;
        return 1;
 }
+
+void __init pci_mmcfg_arch_free(void)
+{
+}

diff --git a/arch/x86/pci/mmconfig_64.c b/arch/x86/pci/mmconfig_64.c
index 9207fd4..a199416 100644 (file)
--- a/arch/x86/pci/mmconfig_64.c
+++ b/arch/x86/pci/mmconfig_64.c
@@ -127,7 +127,7 @@ static void __iomem * __init mcfg_ioremap(struct acpi_mcfg_allocation *cfg)
 int __init pci_mmcfg_arch_init(void)
 {
        int i;
-       pci_mmcfg_virt = kmalloc(sizeof(*pci_mmcfg_virt) *
+       pci_mmcfg_virt = kzalloc(sizeof(*pci_mmcfg_virt) *
                                 pci_mmcfg_config_num, GFP_KERNEL);
        if (pci_mmcfg_virt == NULL) {
                printk(KERN_ERR "PCI: Can not allocate memory for mmconfig structures\n");
@@ -141,9 +141,29 @@ int __init pci_mmcfg_arch_init(void)
                        printk(KERN_ERR "PCI: Cannot map mmconfig aperture for "
                                        "segment %d\n",
                                pci_mmcfg_config[i].pci_segment);
+                       pci_mmcfg_arch_free();
                        return 0;
                }
        }
        raw_pci_ext_ops = &pci_mmcfg;
        return 1;
 }
+
+void __init pci_mmcfg_arch_free(void)
+{
+       int i;
+
+       if (pci_mmcfg_virt == NULL)
+               return;
+
+       for (i = 0; i < pci_mmcfg_config_num; ++i) {
+               if (pci_mmcfg_virt[i].virt) {
+                       iounmap(pci_mmcfg_virt[i].virt);
+                       pci_mmcfg_virt[i].virt = NULL;
+                       pci_mmcfg_virt[i].cfg = NULL;
+               }
+       }
+
+       kfree(pci_mmcfg_virt);
+       pci_mmcfg_virt = NULL;
+}

diff --git a/arch/x86/pci/pci.h b/arch/x86/pci/pci.h
index 28b9b72..c8b89a8 100644 (file)
--- a/arch/x86/pci/pci.h
+++ b/arch/x86/pci/pci.h
@@ -101,6 +101,7 @@ extern void pci_pcbios_init(void);
 /* pci-mmconfig.c */
 
 extern int __init pci_mmcfg_arch_init(void);
+extern void __init pci_mmcfg_arch_free(void);
 
 /*
  * AMD Fam10h CPUs are buggy, and cannot access MMIO config space