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charset="utf-8" From: Carlos Song Mark the I2C adapter as suspended during system suspend to block further transfers, and resume it on system resume. This prevents potential hangs when the hardware is powered down but clients still attempt I2C transfers. Fixes: 358025ac091e ("i2c: imx: make controller available until system susp= end_noirq() and from resume_noirq()") Cc: stable@vger.kernel.org Signed-off-by: Carlos Song --- drivers/i2c/busses/i2c-imx.c | 32 ++++++++++++++++++++++++++++++-- 1 file changed, 30 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c index a208fefd3c3b..3b19d4a424ca 100644 --- a/drivers/i2c/busses/i2c-imx.c +++ b/drivers/i2c/busses/i2c-imx.c @@ -1913,6 +1913,34 @@ static int i2c_imx_runtime_resume(struct device *dev) return ret; } =20 +static int __maybe_unused i2c_imx_suspend_noirq(struct device *dev) +{ + struct imx_i2c_struct *i2c_imx =3D dev_get_drvdata(dev); + int ret; + + ret =3D pm_runtime_force_suspend(dev); + if (ret) + return ret; + + i2c_mark_adapter_suspended(&i2c_imx->adapter); + + return 0; +} + +static int __maybe_unused i2c_imx_resume_noirq(struct device *dev) +{ + struct imx_i2c_struct *i2c_imx =3D dev_get_drvdata(dev); + int ret; + + ret =3D pm_runtime_force_resume(dev); + if (ret) + return ret; + + i2c_mark_adapter_resumed(&i2c_imx->adapter); + + return 0; +} + static int i2c_imx_suspend(struct device *dev) { /* @@ -1946,8 +1974,8 @@ static int i2c_imx_resume(struct device *dev) } =20 static const struct dev_pm_ops i2c_imx_pm_ops =3D { - NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, - pm_runtime_force_resume) + NOIRQ_SYSTEM_SLEEP_PM_OPS(i2c_imx_suspend_noirq, + i2c_imx_resume_noirq) SYSTEM_SLEEP_PM_OPS(i2c_imx_suspend, i2c_imx_resume) RUNTIME_PM_OPS(i2c_imx_runtime_suspend, i2c_imx_runtime_resume, NULL) }; --=20 2.43.0