KVM: use a more sensible error number when debugfs directory creation fails

I don't know if this was due to cut and paste, or somebody was really
using a D20 to pick the error code for kvm_init_debugfs as suggested by
Linus (EFAULT is 14, so the possibility cannot be entirely ruled out).

In any case, this patch fixes it.

Reported-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 0c8eb04a6241da28deb108181213b791c378123b)
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 340c97cf55b682355d3431c0d7249d752985c524..d6b7d797cb164876b9898cb52c1eaf438a602ca3 100644 (file)
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -3010,7 +3010,7 @@ static const struct file_operations *stat_fops[] = {
 
 static int kvm_init_debug(void)
 {
-       int r = -EFAULT;
+       int r = -EEXIST;
        struct kvm_stats_debugfs_item *p;
 
        kvm_debugfs_dir = debugfs_create_dir("kvm", NULL);