Hello, On Wed, Sep 09, 2015 at 10:12:19AM +0800, Gao Pan wrote: > static irqreturn_t i2c_imx_isr(int irq, void *dev_id) > @@ -894,6 +893,10 @@ static int i2c_imx_xfer(struct i2c_adapter *adapter, > > dev_dbg(&i2c_imx->adapter.dev, "<%s>\n", __func__); > > + result = pm_runtime_get_sync(i2c_imx->adapter.dev.parent); > + if (result < 0) > + goto out; > + > /* Start I2C transfer */ > result = i2c_imx_start(i2c_imx); > if (result) > @@ -950,6 +953,10 @@ fail0: > /* Stop I2C transfer */ > i2c_imx_stop(i2c_imx); > > +out: > + pm_runtime_mark_last_busy(i2c_imx->adapter.dev.parent); > + pm_runtime_put_autosuspend(i2c_imx->adapter.dev.parent); > + I doubt that it's correct to call these two functions if pm_runtime_get_sync failed. Shouldn't the out label be after the two calls? Other than that I assume you tested your patch with and without CONFIG_PM? Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ | -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
