[PATCH 2/3] mailbox: mailbox-test: don't free the reused channel

[Wolfram Sang]

The RX channel can be aliased to the TX channel if it has a different
MMIO. This special case needs to be handled when freeing the channels
otherwise a double-free occurs.

Fixes: 8ea4484d0c2b ("mailbox: Add generic mechanism for testing Mailbox Controllers")
Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
---
 drivers/mailbox/mailbox-test.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c
index daf4b6f27d11..0a56b593fcac 100644
--- a/drivers/mailbox/mailbox-test.c
+++ b/drivers/mailbox/mailbox-test.c
@@ -427,7 +427,7 @@ static int mbox_test_probe(struct platform_device *pdev)
 err_free_chans:
 	if (tdev->tx_channel)
 		mbox_free_channel(tdev->tx_channel);
-	if (tdev->rx_channel)
+	if (tdev->rx_channel && tdev->rx_channel != tdev->tx_channel)
 		mbox_free_channel(tdev->rx_channel);
 	return ret;
 }
@@ -440,7 +440,7 @@ static void mbox_test_remove(struct platform_device *pdev)
 
 	if (tdev->tx_channel)
 		mbox_free_channel(tdev->tx_channel);
-	if (tdev->rx_channel)
+	if (tdev->rx_channel && tdev->rx_channel != tdev->tx_channel)
 		mbox_free_channel(tdev->rx_channel);
 }
 
-- 
2.51.0