[PATCH] thunderbolt: debugfs: Fix uninitialized return in counters_write()

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

If the first line is in an invalid format then the "ret" value is
uninitialized.  We should return -EINVAL instead.

Fixes: 54e418106c76 ("thunderbolt: Add debugfs interface")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
---
 drivers/thunderbolt/debugfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/thunderbolt/debugfs.c b/drivers/thunderbolt/debugfs.c
index fdfe6e4afbfe..3680b2784ea1 100644
--- a/drivers/thunderbolt/debugfs.c
+++ b/drivers/thunderbolt/debugfs.c
@@ -231,6 +231,7 @@ static ssize_t counters_write(struct file *file, const char __user *user_buf,
 		char *line = buf;
 		u32 val, offset;
 
+		ret = -EINVAL;
 		while (parse_line(&line, &offset, &val, 1, 4)) {
 			ret = tb_port_write(port, &val, TB_CFG_COUNTERS,
 					    offset, 1);
-- 
2.28.0