[PATCH] xarray: Fix lock/unlock imbalance in xa_alloc

[Gustavo A. R. Silva]

Release *xa_lock* before return.

Addresses-Coverity-ID: 1471631 ("Missing unlock")
Fixes: 29a6bfc32eb2 ("xarray: Track free entries in an XArray")
Signed-off-by: Gustavo A. R. Silva <gust...@embeddedor.com>
---
 lib/xarray.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/xarray.c b/lib/xarray.c
index be10039..a27fdb38 100644
--- a/lib/xarray.c
+++ b/lib/xarray.c
@@ -1474,8 +1474,10 @@ int xa_alloc(struct xarray *xa, u32 *id, void *entry, 
gfp_t gfp)
                xas.xa_index = 0;
                xas_lock(&xas);
                xas_find_tagged(&xas, UINT_MAX, XA_FREE_TAG);
-               if (xas.xa_node == XAS_BOUNDS && xas.xa_index == UINT_MAX + 1)
+               if (xas.xa_node == XAS_BOUNDS && xas.xa_index == UINT_MAX + 1) {
+                       xas_unlock(&xas);
                        return -ENOSPC;
+               }
                *id = xas.xa_index;
                xas_store(&xas, entry);
                xas_clear_tag(&xas, XA_FREE_TAG);
-- 
2.7.4