powerpc/vio: Add missing unlock in error path
Add an unlock before exiting the function.
A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r exists@
expression E1;
identifier f;
@@
f (...) { <+...
* spin_lock_irq (E1,...);
... when != E1
* return ...;
...+> }
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 2f57956..2a3428b 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -645,8 +645,10 @@
found = 1;
break;
}
- if (!found)
+ if (!found) {
+ spin_unlock_irqrestore(&vio_cmo.lock, flags);
return;
+ }
/* Increase/decrease in desired device entitlement */
if (desired >= viodev->cmo.desired) {
