This is a note to let you know that I've just added the patch titled mailbox: imx: fix crash in resume on i.mx8ulp to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mailbox-imx-fix-crash-in-resume-on-i.mx8ulp.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 61408b0831e3d265655469083409fb98f6db1d96 Author: Robin Gong <yibin.gong@xxxxxxx> Date: Mon Feb 7 09:52:07 2022 +0800 mailbox: imx: fix crash in resume on i.mx8ulp [ Upstream commit 8219efd08a0aa1d7944bdb66d84ba57549258968 ] 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@xxxxxxx> Signed-off-by: Robin Gong <yibin.gong@xxxxxxx> Signed-off-by: Peng Fan <peng.fan@xxxxxxx> Signed-off-by: Jassi Brar <jaswinder.singh@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/mailbox/imx-mailbox.c b/drivers/mailbox/imx-mailbox.c index 0ce75c6b36b6..2aeef0bc6930 100644 --- a/drivers/mailbox/imx-mailbox.c +++ b/drivers/mailbox/imx-mailbox.c @@ -668,7 +668,7 @@ 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]); }