mei: me: fix hardware reset flow

Both H_IS and H_IE needs to be set to receive H_RDY
interrupt

1. Assert H_IS to clear the interrupts during hw reset
and use mei_me_reg_write instead of mei_hcsr_set as the later
strips down the H_IS

2. fix interrupt disablement embarrassing typo
  hcsr |= ~H_IE -> hcsr &= ~H_IE;
this will remove the unwanted interrupt on power down

3. remove useless debug print outs

Cc: Shuah Khan <shuah.kh@samsung.com>
Cc: Konstantin Khlebnikov <khlebnikov@openvz.org>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 6 deletions

diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c
index b22c7e247225..3412adcdaeb0 100644
--- a/drivers/misc/mei/hw-me.c
+++ b/drivers/misc/mei/hw-me.c
@@ -176,21 +176,18 @@ 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);
 
-        dev_dbg(&dev->pdev->dev, "before reset HCSR = 0x%08x.\n", hcsr);
-
-        hcsr |= (H_RST | H_IG);
+        hcsr |= H_RST | H_IG | H_IS;
 
         if (intr_enable)
                 hcsr |= H_IE;
         else
-                hcsr |= ~H_IE;
+                hcsr &= ~H_IE;
 
-        mei_hcsr_set(hw, hcsr);
+        mei_me_reg_write(hw, H_CSR, hcsr);
 
         if (dev->dev_state == MEI_DEV_POWER_DOWN)
                 mei_me_hw_reset_release(dev);
 
-        dev_dbg(&dev->pdev->dev, "current HCSR = 0x%08x.\n", mei_hcsr_read(hw));
         return 0;
 }