6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Marek Behún <kabel@xxxxxxxxxx>
[ Upstream commit 0bafb172b111ab27251af0eb684e7bde9570ce4c ]
Do not complete the "command done" completion if there are no waiters.
This can happen if a wait_for_completion() timed out or was interrupted.
Fixes: 389711b37493 ("firmware: Add Turris Mox rWTM firmware driver")
Signed-off-by: Marek Behún <kabel@xxxxxxxxxx>
Reviewed-by: Andy Shevchenko <andy@xxxxxxxxxx>
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/firmware/turris-mox-rwtm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/turris-mox-rwtm.c b/drivers/firmware/turris-mox-rwtm.c
index 2de0fb139ce17..efd35d308aac9 100644
--- a/drivers/firmware/turris-mox-rwtm.c
+++ b/drivers/firmware/turris-mox-rwtm.c
@@ -2,7 +2,7 @@
/*
* Turris Mox rWTM firmware driver
*
- * Copyright (C) 2019 Marek Behún <kabel@xxxxxxxxxx>
+ * Copyright (C) 2019, 2024 Marek Behún <kabel@xxxxxxxxxx>
*/
#include <linux/armada-37xx-rwtm-mailbox.h>
@@ -174,6 +174,9 @@ static void mox_rwtm_rx_callback(struct mbox_client *cl, void *data)
struct mox_rwtm *rwtm = dev_get_drvdata(cl->dev);
struct armada_37xx_rwtm_rx_msg *msg = data;
+ if (completion_done(&rwtm->cmd_done))
+ return;
+
rwtm->reply = *msg;
complete(&rwtm->cmd_done);
}
--
2.43.0
