From 8219efd08a0aa1d7944bdb66d84ba57549258968 Mon Sep 17 00:00:00 2001
From: Robin Gong <yibin.gong@nxp.com>
Date: Mon, 7 Feb 2022 09:52:07 +0800
Subject: [PATCH] mailbox: imx: fix crash in resume on i.mx8ulp
Git-commit: 8219efd08a0aa1d7944bdb66d84ba57549258968
Patch-mainline: v5.18-rc1
References: git-fixes
check 'priv->clk' before 'imx_mu_read()' otherwise crash happens on
i.mx8ulp, since clock not enabled.
Fixes: 4f0b776ef5831 ("mailbox: imx-mailbox: support i.MX8ULP MU")
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/mailbox/imx-mailbox.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c
index 8b1399e5d7bf..a0c252415c86 100644
--- a/drivers/mailbox/imx-mailbox.c
+++ b/drivers/mailbox/imx-mailbox.c
@@ -725,7 +725,7 @@ static int __maybe_unused imx_mu_resume_noirq(struct device *dev)
* send failed, may lead to system freeze. This issue
* is observed by testing freeze mode suspend.
*/
- if (!imx_mu_read(priv, priv->dcfg->xCR[0]) && !priv->clk) {
+ if (!priv->clk && !imx_mu_read(priv, priv->dcfg->xCR[0])) {
for (i = 0; i < IMX_MU_xCR_MAX; i++)
imx_mu_write(priv, priv->xcr[i], priv->dcfg->xCR[i]);
}
--
2.31.1