Commit c20c68d5 authored by Tomas Winkler's avatar Tomas Winkler Committed by Greg Kroah-Hartman
Browse files

mei: check if the hardware reset succeeded 



The hw may have multiple steps for resetting
so we need to check if it has really succeeded.

Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 206ecfc2

drivers/misc/mei/hw-me.c

+2 −1
Original line number Diff line number Diff line
@@ -171,7 +171,7 @@ static void mei_me_hw_reset_release(struct mei_device *dev) 
 * @dev: the device structure

 * @intr_enable: if interrupt should be enabled after reset.

 */

static void mei_me_hw_reset(struct mei_device *dev, bool intr_enable)

static int mei_me_hw_reset(struct mei_device *dev, bool intr_enable)

{

	struct mei_me_hw *hw = to_me_hw(dev);

	u32 hcsr = mei_hcsr_read(hw);
@@ -191,6 +191,7 @@ static void mei_me_hw_reset(struct mei_device *dev, bool intr_enable) 
		mei_me_hw_reset_release(dev);



	dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", mei_hcsr_read(hw));

	return 0;

}



/**

drivers/misc/mei/init.c

+7 −1
Original line number Diff line number Diff line
@@ -132,13 +132,19 @@ EXPORT_SYMBOL_GPL(mei_start); 
void mei_reset(struct mei_device *dev, int interrupts_enabled)

{

	bool unexpected;

	int ret;



	unexpected = (dev->dev_state != MEI_DEV_INITIALIZING &&

			dev->dev_state != MEI_DEV_DISABLED &&

			dev->dev_state != MEI_DEV_POWER_DOWN &&

			dev->dev_state != MEI_DEV_POWER_UP);



	mei_hw_reset(dev, interrupts_enabled);

	ret = mei_hw_reset(dev, interrupts_enabled);

	if (ret) {

		dev_err(&dev->pdev->dev, "hw reset failed disabling the device\n");

		interrupts_enabled = false;

		dev->dev_state = MEI_DEV_DISABLED;

	}



	dev->hbm_state = MEI_HBM_IDLE;

drivers/misc/mei/mei_dev.h

+3 −3
Original line number Diff line number Diff line
@@ -233,7 +233,7 @@ struct mei_hw_ops { 
	bool (*host_is_ready) (struct mei_device *dev);



	bool (*hw_is_ready) (struct mei_device *dev);

	void (*hw_reset) (struct mei_device *dev, bool enable);

	int (*hw_reset) (struct mei_device *dev, bool enable);

	int  (*hw_start) (struct mei_device *dev);

	void (*hw_config) (struct mei_device *dev);
@@ -539,9 +539,9 @@ static inline void mei_hw_config(struct mei_device *dev) 
{

	dev->ops->hw_config(dev);

}

static inline void mei_hw_reset(struct mei_device *dev, bool enable)

static inline int mei_hw_reset(struct mei_device *dev, bool enable)

{

	dev->ops->hw_reset(dev, enable);

	return dev->ops->hw_reset(dev, enable);

}



static inline void mei_hw_start(struct mei_device *dev)