[PATCH 5/6] generic/775: Fix an infinite loop due to variable name clash

We use i as the iteration variable in the main test loop as well as some
internal loops. Due to this clash, $i variable of main test loops was
getting modified by the following loop in prep_mixed_mapping().

	for ((i=0; i<num_blocks; i++)); do

If num_blocks is less than 10 (example ext4 with blocksize 4k and
cluster size 8k) i would always be set as 3 and the main loop would
never exit. Use local variable to fix this and while we are at it,
rename it for clarity.

Reported-by: Disha Goel <[email protected]>
Signed-off-by: Ojaswin Mujoo <[email protected]>
---
 tests/generic/775 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tests/generic/775 b/tests/generic/775
index 2a4287bb..6dc005a0 100755
--- a/tests/generic/775
+++ b/tests/generic/775
@@ -41,7 +41,8 @@ prep_mixed_mapping() {
 
 	local operations=("W" "H" "U")
 	local num_blocks=$((awu_max / blksz))
-	for ((i=0; i<num_blocks; i++)); do
+	local blkno
+	for ((blkno=0; blkno<num_blocks; blkno++)); do
 		local index=$((RANDOM % ${#operations[@]}))
 		local map="${operations[$index]}"
 		local mapping="${mapping}${map}"
-- 
2.53.0