sparc64: refactor code in viohs.c

The sparc64 allmodconfig build broke due to enabling of the
branch_tracer that does some very clever things with
all if conditions. This caused my gcc 3.4.5 to be so confused that
it emitted a warning:

arch/sparc/kernel/viohs.c: In function `vio_control_pkt_engine':
arch/sparc/kernel/viohs.c:335: warning: 'nver' might be used uninitialized in this function

And with -Werror this broke the build.

Refactor code so it:
1) becomes more readable
2) no longer emit a warning with the branch_tracer enabled

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/arch/sparc/kernel/viohs.c b/arch/sparc/kernel/viohs.c
index 708fa1705fbe..aa6ac70d4fd5 100644
--- a/arch/sparc/kernel/viohs.c
+++ b/arch/sparc/kernel/viohs.c
@@ -337,8 +337,10 @@ static int process_ver_nack(struct vio_driver_state *vio,
         viodbg(HS, "GOT VERSION NACK maj[%u] min[%u] devclass[%u]\n",
                pkt->major, pkt->minor, pkt->dev_class);
 
-        if ((pkt->major == 0 && pkt->minor == 0) ||
-            !(nver = find_by_major(vio, pkt->major)))
+        if (pkt->major == 0 && pkt->minor == 0)
+                return handshake_failure(vio);
+        nver = find_by_major(vio, pkt->major);
+        if (!nver)
                 return handshake_failure(vio);
 
         if (send_version(vio, nver->major, nver->minor) < 0)