mtd: mtdswap: fix compilation warning

Fix the following compilation warning:

drivers/mtd/mtdswap.c: In function ‘mtdswap_pick_gc_eblk’:
drivers/mtd/mtdswap.c:859: warning: ‘idx’ may be used uninitialized in this function
drivers/mtd/mtdswap.c:859: note: ‘idx’ was declared here

Initialize idx to -1 because this value means "no tree choosen".

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c
index dc4b136800b8..237913c5c92c 100644
--- a/drivers/mtd/mtdswap.c
+++ b/drivers/mtd/mtdswap.c
@@ -850,7 +850,7 @@ static int mtdswap_wlfreq(unsigned int maxdiff)
 static int mtdswap_choose_wl_tree(struct mtdswap_dev *d)
 {
         static unsigned int pick_cnt;
-        unsigned int i, idx, wear, max;
+        unsigned int i, idx = -1, wear, max;
         struct rb_root *root;
 
         max = 0;