[PATCH v3 01/10] mailbox: imx: Forward the timeout/ error in imx_mu_generic_tx()

[Sebastian Andrzej Siewior]

imx_mu_generic_tx() for the IMX_MU_TYPE_TXDB_V2 type polls on a register
which may timeout and is recognized as an error. This error is siltently
dropped and not dropped to the caller.

Forward the error to the caller.

Fixes: b5ef17917f3a7 ("mailbox: imx: fix TXDB_V2 channel race condition")
Signed-off-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
---
 drivers/mailbox/imx-mailbox.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 246a9a9e39520..0028073be4a71 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -227,6 +227,7 @@ static int imx_mu_generic_tx(struct imx_mu_priv *priv,
 	u32 val;
 	int ret, count;
 
+	ret = 0;
 	switch (cp->type) {
 	case IMX_MU_TYPE_TX:
 		imx_mu_write(priv, *arg, priv->dcfg->xTR + cp->idx * 4);
@@ -259,7 +260,7 @@ static int imx_mu_generic_tx(struct imx_mu_priv *priv,
 		return -EINVAL;
 	}
 
-	return 0;
+	return ret;
 }
 
 static int imx_mu_generic_rx(struct imx_mu_priv *priv,

-- 
2.53.0