[PATCH] firmware: turris-mox-rwtm: Fix an error handling path in mox_get_board_info()

[Christophe JAILLET]

wait_for_completion_timeout() returns 0 if timed out, and positive (at
least 1, or number of jiffies left till timeout) if completed.

In case of timeout, return -ETIMEDOUT.

Fixes: 389711b37493 ("firmware: Add Turris Mox rWTM firmware driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@xxxxxxxxxx>
---
Compile tested only.
---
 drivers/firmware/turris-mox-rwtm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/turris-mox-rwtm.c b/drivers/firmware/turris-mox-rwtm.c
index 6ea5789a89e2..577e87e1c6ee 100644
--- a/drivers/firmware/turris-mox-rwtm.c
+++ b/drivers/firmware/turris-mox-rwtm.c
@@ -200,8 +200,8 @@ static int mox_get_board_info(struct mox_rwtm *rwtm)
 		return ret;
 
 	ret = wait_for_completion_timeout(&rwtm->cmd_done, HZ / 2);
-	if (ret < 0)
-		return ret;
+	if (ret == 0)
+		return -ETIMEDOUT;
 
 	ret = mox_get_status(MBOX_CMD_BOARD_INFO, reply->retval);
 	if (ret == -ENODATA) {
-- 
2.34.1