s390/sysinfo,stsi: change return code handling

Change return code handling of the stsi() function:

In case function code 0 was specified the return value is the
current configuration level (already shifted). That way all
the code that actually copied the stsi_0() function can go
away.

Otherwise the return value is 0 (success) or negative to
indicate an error (currently only -EOPNOTSUPP).

Also stsi() is no longer an inline function. The function is
not performance critical, but every caller would generate an
exception table entry for this function.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 60da903d6f3e..310be61bead7 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -211,7 +211,7 @@ static void handle_stsi_3_2_2(struct kvm_vcpu *vcpu, struct sysinfo_3_2_2 *mem)
         spin_unlock(&fi->lock);
 
         /* deal with other level 3 hypervisors */
-        if (stsi(mem, 3, 2, 2) == -ENOSYS)
+        if (stsi(mem, 3, 2, 2))
                 mem->count = 0;
         if (mem->count < 8)
                 mem->count++;
@@ -259,7 +259,7 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
                 mem = get_zeroed_page(GFP_KERNEL);
                 if (!mem)
                         goto out_fail;
-                if (stsi((void *) mem, fc, sel1, sel2) == -ENOSYS)
+                if (stsi((void *) mem, fc, sel1, sel2))
                         goto out_mem;
                 break;
         case 3: