pci, x86, acpi: fix early_ioremap() leak

Pawel reported:
------------[ cut here ]------------
WARNING: at arch/x86/mm/ioremap.c:616 check_early_ioremap_leak+0x52/0x67()
Hardware name:
Debug warning: early ioremap leak of 1 areas detected.
Modules linked in:
Pid: 1, comm: swapper Not tainted 2.6.29-rc4-tip #2
...

Reported-by: Pawel Dziekonski <dzieko@gmail.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index f5a662a..519f5f9 100644 (file)
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -42,6 +42,7 @@
 LIST_HEAD(dmar_drhd_units);
 
 static struct acpi_table_header * __initdata dmar_tbl;
+static acpi_size dmar_tbl_size;
 
 static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd)
 {
@@ -288,8 +289,9 @@ static int __init dmar_table_detect(void)
        acpi_status status = AE_OK;
 
        /* if we could find DMAR table, then there are DMAR devices */
-       status = acpi_get_table(ACPI_SIG_DMAR, 0,
-                               (struct acpi_table_header **)&dmar_tbl);
+       status = acpi_get_table_with_size(ACPI_SIG_DMAR, 0,
+                               (struct acpi_table_header **)&dmar_tbl,
+                               &dmar_tbl_size);
 
        if (ACPI_SUCCESS(status) && !dmar_tbl) {
                printk (KERN_WARNING PREFIX "Unable to map DMAR\n");
@@ -481,6 +483,7 @@ void __init detect_intel_iommu(void)
                        iommu_detected = 1;
 #endif
        }
+       early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size);
        dmar_tbl = NULL;
 }