[kernel] Patch to fix efivarfs underflow from Lingzhu Xiang (rhbz 888163)

[Josh Boyer]

commit fd89f36b90d433790003bbac221799483e0091e4
Author: Josh Boyer <jwboyer at redhat.com>
Date:   Mon Jan 7 11:25:41 2013 -0500

    Patch to fix efivarfs underflow from Lingzhu Xiang (rhbz 888163)

 efivarfs-nlink-fix.patch |   24 ++++++++++++++++++++++++
 kernel.spec              |    5 +++++
 2 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/efivarfs-nlink-fix.patch b/efivarfs-nlink-fix.patch
new file mode 100644
index 0000000..4216586
--- /dev/null
+++ b/efivarfs-nlink-fix.patch
@@ -0,0 +1,24 @@
+efivarfs_unlink() should drop the file's link count, not the directory's.
+
+Tested-by: Lee, Chun-Yi <jlee at suse.com>
+Signed-off-by: Lingzhu Xiang <lxiang at redhat.com>
+---
+ drivers/firmware/efivars.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
+index d6b8d2f..60f5324 100644
+--- a/drivers/firmware/efivars.c
++++ b/drivers/firmware/efivars.c
+@@ -995,7 +995,7 @@ static int efivarfs_unlink(struct inode *dir, struct dentry *dentry)
+ 		list_del(&var->list);
+ 		spin_unlock(&efivars->lock);
+ 		efivar_unregister(var);
+-		drop_nlink(dir);
++		drop_nlink(dentry->d_inode);
+ 		dput(dentry);
+ 		return 0;
+ 	}
+-- 
+1.7.7.6
+
diff --git a/kernel.spec b/kernel.spec
index b666bc8..671d805 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -687,6 +687,7 @@ Patch800: linux-2.6-crash-driver.patch
 
 # secure boot
 Patch1000: secure-boot-20130104.patch
+Patch1001: efivarfs-nlink-fix.patch
 
 # virt + ksm patches
 
@@ -1392,6 +1393,7 @@ ApplyPatch linux-2.6-e1000-ich9-montevina.patch
 
 # secure boot
 ApplyPatch secure-boot-20130104.patch
+ApplyPatch efivarfs-nlink-fix.patch
 
 # Assorted Virt Fixes
 
@@ -2308,6 +2310,9 @@ fi
 #                 ||----w |
 #                 ||     ||
 %changelog
+* Mon Jan 07 2013 Josh Boyer <jwboyer at redhat.com>
+- Patch to fix efivarfs underflow from Lingzhu Xiang (rhbz 888163)
+
 * Sat Jan  5 2013 Peter Robinson <pbrobinson at fedoraproject.org>
 - Initial update of ARM configs for 3.8
 - Enable DRM driver for tegra