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mailbox: imx: fix crash in resume on i.mx8ulp

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[ Upstream commit 8219efd08a ]

check 'priv->clk' before 'imx_mu_read()' otherwise crash happens on
i.mx8ulp, since clock not enabled.

Fixes: 4f0b776ef5 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Robin Gong 2022-02-07 09:52:07 +08:00 committed by Greg Kroah-Hartman
parent 613e1b253f
commit 8bddc0227e
1 changed files with 1 additions and 1 deletions
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2
drivers/mailbox/imx-mailbox.c
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@ -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]);
}