From: Ian Jackson <ian.jackson@eu.citrix.com>
Date: Mon, 26 Jan 2009 12:07:15 +0000 (+0000)
Subject: check mmap return value when mapping MSI-x table
X-Git-Tag: t.master-before-merge~22^2~5
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=7b3415ada605f3fc372809b897489820c6a38677;p=qemu-xen-3.4-testing.git

check mmap return value when mapping MSI-x table

Signed-off-by: Yu Zhao <yu.zhao@intel.com>
---

diff --git a/hw/pt-msi.c b/hw/pt-msi.c
index c515c02b..4f251864 100644
--- a/hw/pt-msi.c
+++ b/hw/pt-msi.c
@@ -322,6 +322,12 @@ int pt_msix_init(struct pt_dev *dev, int pos)
     dev->msix->phys_iomem_base = mmap(0, total_entries * 16,
                           PROT_WRITE | PROT_READ, MAP_SHARED | MAP_LOCKED,
                           dev->msix->fd, dev->msix->table_base + table_off);
+    if ( dev->msix->phys_iomem_base == MAP_FAILED )
+    {
+        PT_LOG("Can't map physical MSI-X table: %s\n", strerror(errno));
+        return -1;
+    }
+
     PT_LOG("mapping physical MSI-X table to %lx\n",
            (unsigned long)dev->msix->phys_iomem_base);
     return 0;